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According to the Handbook of Texas, the East Texas area "may be separated from the rest of Texas roughly by a line extending from the Red River in north-central Lamar County southwestward to east-central Limestone County and then southeastward towards eastern Galveston Bay", though most sources separate the Gulf Coast area into a separate region. 
Another popular, somewhat simpler, definition defines East Texas as the region between the Trinity River, north and east of Houston, (or sometimes Interstate 45, when defining generously) as the western border, the Louisiana border as the eastern border, the Gulf of Mexico as the southern border, the Oklahoma border as the northern border, Arkansas as the northeastern border, and extending as far south as Orange, Texas. The East Texas regions includes Tyler, Longview, Lufkin, Marshall, Palestine, Henderson, Jacksonville, Mount Pleasant, and Nacogdoches
Most of the region consists of the Piney Woods ecoregion, and East Texas can sometimes be reduced to include only the Piney Woods.  At the fringes, towards Central Texas, the forests expand outward toward sparser trees and eventually into open plains.
East Texas comprises 41 counties, 38 of which collaborate in sub-regional Ark-Tex Council of Governments, the East Texas Council of Governments, the Deep East Texas Council of Governments and the South East Texas Regional Planning Commission.
Counties included are Anderson, Angelina, Bowie, Camp, Cass, Cherokee, Delta, Franklin, Gregg, Hardin, Harrison, Henderson, Hopkins, Houston, Jasper, Jefferson, Lamar, Marion, Morris, Nacogdoches, Newton, Orange, Panola, Polk, Rains, Red River, Rusk, Sabine, San Augustine, San Jacinto, Shelby, Smith, Titus, Trinity, Tyler, Upshur, Van Zandt, and Wood County, Texas. 
The three additional East Texas counties that join with other regional government councils are Chambers County (Anahuac), Liberty County (Liberty), and Walker County (Huntsville), all three in geographic proximity to the Houston metropolitan areas.
Outside of the Greater Houston area, the average population density is around 18–45 per mi2 (7–12 per km2), with the population density near the Big Thicket dropping below 18 people per mi2. East Texas's population is very large and is centered around the Golden Triangle (Texas), which is Beaumont/ Port Arthur/ Orange in Southeast Texas. Moving north from the coast, Lufkin and Nacogdoches anchor the population center of Deep East Texas. Continuing north from Deep East Texas, Tyler, Longview, and Marshall, in Northeast Texas, along with Texarkana, on the far northeastern border with Arkansas, represent the major population centers in the northern section of East Texas. Only 8 mi from the Texas border, Shreveport, Louisiana, is considered the economic and cultural center for the Ark-La-Tex, the area where Arkansas, Louisiana, and East Texas meet.
The 2010 U.S. Census shows these 41 East Texas counties with a population of 2,057,518 residents, which represents 8% of the total state population of Texas.
Per the 2010 US Census records, the five most populous counties are:
- Jefferson County (252,273)
- Smith County (209,714)
- Gregg County (121,730)
- Bowie County (92,565)
- Angelina County (86,771)
Per the 2010 US census records, the ten most populous East Texas cities are:
- Beaumont (118,296)
- Tyler (98,564)
- Longview (81,336)
- Port Arthur (53,937)
- Huntsville (38,548) (Huntsville, Walker County, Texas is not of the above 41 listed counties of East Texas.)
- Texarkana, Texas (36,411)
- Lufkin (35,067)
- Nacogdoches (32,996)
- Paris, Texas (25,151)
- Marshall (23,523)
According to US Census records from 2010, the population of East Texas counties is 65.93% White non-Hispanic, 17.44% African American, 14.29% Hispanic or Latino origin, and 2.34% Other (including Native American and Asian). East Texas' most ethnically and racially diverse county is Jefferson County, its largest county, which includes the city of Beaumont, with 44.1% White non-Hispanic, 34.1% African American, 17.7% Hispanic or Latino origin and 4.1% other (including Native American and Asian). East Texas is within the Black Belt region.   Unlike Texas' total state racial demographics, only two counties in East Texas have a majority minority, Jefferson County in the Golden Triangle and Titus County having a 40.6% Hispanic or Latino origin population. East Texas and Southeast Texas have a significant African-American population, ranging to nearly 20% in some counties.
Climate is the unifying factor in the region's geography; all of East Texas has the humid subtropical climate typical of the Southeast, occasionally interrupted by intrusions of cold air from the north. East Texas receives more rainfall, 35 to 60 inches (890 to 1,520 mm), than the rest of Texas.  In Houston, the average January temperature is 50.4 °F (10.2 °C) and the average July temperature is 82.6 °F (28.1 °C), but Houston has slightly warmer winters than most of East Texas due to its lower latitude and proximity to the coast.
All of East Texas also lies within the Gulf Coastal Plain, but with less uniformity than the climate with rolling hills in the north and flat coastal plains in the south. Local vegetation also varies from north to south with the lower third consisting of the temperate grassland extending from South Texas to South Louisiana. The northern two-thirds of the region is dominated by temperate forest known as the Piney Woods, which extends over 23,500 square miles (61,000 km2). The Piney Woods are part of a much larger region of pine- hardwood forest that extends into Louisiana, Arkansas, and Oklahoma. The Piney Woods area thins out as it nears the Gulf of Mexico. West of the Piney Woods are the ranchlands and remnant oak forests of the East Central Texas forests ecoregion.
The Sabine, Trinity, Neches, Angelina and Sulphur Rivers are the major rivers in East Texas, but the Brazos River and Red River also flow through the region. The Brazos cuts through the southwest portion of the region, while the Red River forms its northern border with Oklahoma and a portion of Arkansas. In East Texas and the rest of the South, small rivers and creeks collect into swamps called " bayous" and merge with the surrounding forest. Bald cypress and Spanish moss are the dominant plants in bayous. The most famous of these bayous are Cypress Bayou and Buffalo Bayou. Cypress Bayou surrounds the Big, Little, and Black Cypress Rivers around Jefferson. They flow east into Caddo Lake, and the adjoining wetlands cover the rim and islands of the lake.
East Texas is often considered the westernmost extension of the Deep South. The predominant cultural influence comes from customs and traditions passed down from European-American and African-American Southerners who settled the region during the mid- and late 19th century. African Americans were first brought to the area as slaves to work on plantations. These influences are noticeable in the subdialect of Texan English that is spoken throughout the region. According to the most recent linguistic studies, East Texans tend to pronounce Southern English with the drawl typical of the Lower South, whereas other parts of Texas are more prone to the "twang" of the Upper South, or—depending upon demographic influences of the particular area—with some Hispanic and Midwestern traits.
East Texas lacks the strong influence of late 19th- and early 20th-century European immigrants from Germany and central Europe. Similarly, the new waves of immigrants since the late 20th century, primarily from India, other Asian nations, and Latin America, and their influences, have been less prevalent in East Texas.
East Texans are predominantly Protestant Christians, expressing their faith as members of many denominations: Baptist (particularly Southern Baptist), Methodist, Presbyterian, Lutheran, Pentecostal, and others. Catholicism continues to have influence, particularly with an increased Hispanic population in recent decades. Other religions with smaller numbers, but with adherents in East Texas, include Mormonism and Judaism.
Significant numbers of people of Cajun and Creole descent have come from Louisiana, although most are assimilated partially or completely into East Texas culture (adopting the local culture and losing, to varying degrees, their original culture). This assimilation pattern has often historically included conversion from Catholicism to Protestant faiths. United States settlers from the Protestant Southeast practiced some discrimination against Cajun and Creole migrants, a cultural attitude that persisted until quite recently. Despite the tendency towards assimilation, Cajun and Creole cuisine (for example, jambalaya and catfish gumbo), are popular in the region. Many East Texans, including those without Louisiana roots, are known to be expert at preparing at least some well-known Louisiana dishes.
While some East Texans associate with cowboy culture, most identify more with plantation traditions of the South than with the expansive cattle ranching of the plains regions of Texas. However, East Texans commonly own and trade cattle. Several "sale barns" exist across East Texas, with weekly and monthly trades, as is common in other parts of the lower South.
In the northern part of East Texas, awareness of the native and historical Caddo Mississippian culture remains significant. Cherokee County is home to the Caddo Mounds State Historic Site. Patrons can also view the "Caddo Indian Collection" at the Gregg County Historical Museum in Longview. In the mid-19th century, East Texas cities such as Marshall and Jefferson constituted a sphere of influence that led the entire state into the Confederacy, and during the Mexican and Republic periods, Nacogdoches and San Augustine were the most developed and influential cities in East Texas.
The Museum of East Texas opened in Lufkin in 1976 under the name Lufkin Historical and Creative Arts Center. 
East Texas is home to the Texas Country Music Hall of Fame, located in Carthage. East Texans enjoy a range of music that is influenced by gospel, bluegrass, blues, rock, country, soul, rhythm and blues, Cajun, etc. Texas blues originated in East Texas, with many legends having been born in the region, including Lightnin' Hopkins and T-Bone Walker. East Texans enjoy live music at many of the region's fairs and festivals, including the Texas Rose Festival in Tyler, the East Texas Yamboree in Gilmer, and Longview's Great Texas Balloon Race. East Texas also has many venues included in what is commonly referred to as the Texas country music circuit, although the majority of such venues are located in Central/South/West Texas and the metropolitan areas of the state.
Many notable music artists have East Texas roots, including: George Jones (Saratoga), Miranda Lambert (Lindale), Kacey Musgraves (Mineola), Jamie Foxx, (Terrell), Neal McCoy (Longview and Jacksonville), Lee Ann Womack (Jacksonville), Janis Joplin (Port Arthur), Don Henley (Linden), Ray Price (Perryville), Johnny Horton (Rusk), Johnny Mathis (Gilmer), Tex Ritter (Panola County), Jim Reeves (Panola County), Mark Chesnutt (Beaumont), Tracy Byrd (Vidor), Clay Walker (Beaumont), T-Bone Walker (Linden), Chris Tomlin (Grand Saline), and Michelle Shocked (Gilmer), among many others.
Many high-school bands in East Texas continue the tradition of military-style marching, unlike other parts of the state. These bands compete in the National Association Of Military Marching Bands.
As with other parts of Texas, high school football is the most popular sport in East Texas. Residents of East Texas towns and rural communities fill high-school stadiums in support of their local teams, cheerleaders, bands, etc. Many East Texas high-school teams have won Texas state championships and have produced collegiate and professional football players.
Earl Campbell, the "Tyler Rose", played football for John Tyler High in Tyler before playing for the Texas Longhorns and the Houston Oilers. Don Meredith, who famously played for the Dallas Cowboys, played at Mt. Vernon. Dez Bryant, a football player from Lufkin, formerly played wide receiver for the Dallas Cowboys before signing with the New Orleans Saints (then getting injured three days afterwards). Adrian Peterson, a star running back for the Minnesota Vikings, played high-school football in Palestine. Other high-school sports are popular in East Texas, including basketball, baseball, volleyball, softball and track.
A significant number of East Texas youth participate in Little League Baseball, soccer, and softball. Church leagues are quite common in providing opportunities for basketball and softball for youth and adults alike. In recent years, cowboy churches have grown in number and offer rodeo events for their youth.
East Texans also enjoy collegiate athletic competition. Most residents support collegiate teams located in other regions of the state; the Texas A&M Aggies, Texas Longhorns, Texas Tech Red Raiders, Baylor Bears, TCU Horned Frogs, etc. Due to proximity to neighboring states, East Texas has a substantial number of fans of the LSU Tigers, Arkansas Razorbacks, Oklahoma State Cowboys, and Oklahoma Sooners. The Battle of the Piney Woods is a fiercely contested sports rivalry between the Bearkats of Sam Houston State University in Huntsville and the Lumberjacks of Stephen F. Austin State University in Nacogdoches. Both compete in the FCS level of NCAA athletic competition as members of the Southland Conference. The Cardinals of Lamar University in Beaumont also compete with Stephen F. Austin and Sam Houston State in the Southland Conference.
Other universities and colleges that field athletic teams in East Texas include East Texas Baptist University Tigers in Marshall; University of Texas at Tyler Patriots in Tyler; LeTourneau University Yellowjackets in Longview; Texas A&M–Commerce Lions; and several junior colleges throughout the region, which participate in the Southwest Junior College Conference in Region XIV of the NJCAA. East Texas is also home to the Kilgore College Rangerettes, a world-famous dance team that debuted in 1939.
A few professional sports teams are located in East Texas. The East Texas Pump Jacks, located in Kilgore, play baseball in the Texas Collegiate League. Additionally, the East Texas Storm, a semiprofessional football team located in Tyler, competes in the Lone Star Minor League.  Typically, northern parts of East Texas tend to support the professional teams from the Dallas/Fort Worth area ( Dallas Cowboys, Dallas Mavericks, Texas Rangers, Dallas Stars), while southern parts of East Texas tend to support professional teams from the Houston area ( Houston Texans, Houston Rockets, Houston Astros).
As with other parts of Texas and/or the South, other popular sporting activities in East Texas include rodeo (including PRCA), hunting, and fishing. Prominent rodeos in East Texas are held in Beaumont, Nacogdoches, Paris, Longview, Gladewater, Huntsville, Lufkin, Athens, Palestine, Lindale, etc. East Texas contains several award-winning lakes for sport fishing including Toledo Bend Reservoir, Lake Sam Rayburn, Lake Livingston, Lake Fork Reservoir, Lake Tawakoni, etc. East Texans have a long tradition in outdoors sporting and observe the opening day of deer season as a near religious holiday.
East Texas also contains numerous golf courses and avid golfers, as well as NASCAR fans. However, the region does not host professional events in either of those sports. The nearest NASCAR track to East Texas is Texas Motor Speedway in Fort Worth.
East Texans enjoy many Texas state parks, including Caddo Lake, Atlanta, Daingerfield, Lake Bob Sandlin, Tyler, Mission Tejas in Grapeland, Cooper Lake, Lake Tawakoni, Martin Creek, Huntsville, Lake Sam Rayburn, Lake Livingston and Sea Rim among others. East Texas is also home to the Angelina National Forest, Sam Houston National Forest, Sabine National Forest, Big Thicket National Preserve, Trinity River National Wildlife Refuge, Anahuac National Wildlife Refuge, and McFaddin National Wildlife Refuge.
- Sandy Duncan, Henderson, Rusk County and Tyler, Smith County
- George Foreman, Marshall, Harrison County
- Jamie Foxx, Terrell, Kaufman County
- Sam Houston, former president of the Republic of Texas, former governor of Texas, retired in Huntsville, Walker County
- Lady Bird Johnson, former First Lady of the United States, born in Karnack, Harrison County
- Joe R. Lansdale, award-winning author and martial arts expert, born in Gladewater, Gregg County
- Richard Linklater, film-maker, Huntsville, Walker County
- Matthew McConaughey, Longview, Gregg County
- Lonnie "Bo" Pilgrim, founder of Pilgrim's Pride Chicken, Pittsburg, Camp County
- Ross Perot, former U.S. presidential candidate born in Texarkana, Bowie County
- Adrian Peterson, Palestine, Anderson county
- Tye Sheridan, Elkhart, Anderson County
- Carroll Shelby, racer and car developer known for Shelby Cobra and numerous Ford and Chrysler products, Leesburg, Camp County
- Sissy Spacek, Quitman, Wood County
- William B. Travis, famous commander at the Alamo, settled in Anahuac, Chambers County
- Forest Whitaker, Longview, Gregg County
- Former United States Senators:
- Horace Chilton born near Tyler, Smith County
- Charles Allen Culberson settled in Gilmer, Upshur County and Jefferson, Marion County
- James W. Flanagan settled in Henderson, Rusk County
- Samuel B. Maxey settled in and practiced law in Paris, Lamar County
- John Henninger Reagan practiced law in Palestine and Henderson County
- Thomas Jefferson Rusk settled in Nacogdoches, Nacogdoches County, and was also a Chief Justice of the Supreme Court of the Republic of Texas
- Morris Sheppard born in Morris County
- Matthias Ward settled in Clarksville, Red River County and Jefferson, Marion County
- Louis Wigfall lived in Nacogdoches, Nacogdoches County and Marshall, Harrison County
- Ralph Yarborough born in Chandler, Henderson County
- Other former governors of Texas:
- Thomas Mitchell Campbell, born in Rusk, Cherokee County
- Oscar Branch Colquitt, newspaper owner in Pittsburg, Camp County and in Morris County
- Price Daniel, born in Dayton, Liberty County
- James Pinckney Henderson, first governor of Texas, practiced law in San Augustine, San Augustine County
- William P. Hobby, born in Moscow, Polk County
- Jim Hogg, born in Rusk, Cherokee County
- Richard B. Hubbard, lived in Tyler, Smith County and Lindale, Smith County
- Allan Shivers, born in Lufkin, Angelina County
- Ross S. Sterling, born in Anahuac, Chambers County
- Mark White, born in Henderson, Rusk County
- George Tyler Wood, second governor of Texas, settled near Point Blank in Liberty County and San Jacinto County
Deep East Texas is a sub-region of East Texas. According to the Deep East Texas Council of Governments the region consists of the following twelve counties: Angelina, Houston, Jasper, Nacogdoches, Newton, Polk, Sabine, San Augustine, San Jacinto, Shelby, Trinity, and Tyler.
The "Deep" designation comes from the similarity to East Texas (it is similar in culture and topography, being highly forested), but with a location "deeper" (i.e., farther south and towards the Gulf Coast) than the rest of East Texas.
"Deep" also refers to the cultural and social characteristics of the area and is considered synonymous to the " Big Thicket", an allusion to the dense growth of underbrush in the Piney Woods. It was the earliest area of Texas to be settled by Anglo-Americans (and one of the last areas to submit to law enforcement—by the governments of New Spain, Mexico, the Republic of Texas, the state of Texas, or the United States). Renegade clans controlled local governments, especially in Shelby County, well into the first quarter of the 20th century.[ citation needed]
The area contains two of the oldest towns in Texas; Nacogdoches, the oldest town in Texas, dating from 18th century, and San Augustine, the oldest "Anglo" settlement in Texas, dating from the 1820s. People of English, Scottish, Scots-Irish, and to a lesser extent Welsh ancestry predominate in the region, which is in contrast to South Central Texas and West Texas, where people of German and Hispanic heritage predominate, respectively. Prior to the Texas War of Independence, settlement was generally prohibited by the Spanish and later Mexican governments, but neither government was able to exert control or law enforcement in the area. As a consequence, the "Big Thicket" became a refuge for criminals fleeing the United States and hiding out in a "no man's land" in the pine tree thickets.
The early isolation of the region and its links to the Deep South have resulted in its well-known pine woods being described as a 'curtain' that demarcates a certain cultural enclave or bubble that distinguishes East Texas from the rest of the state. Former residents describe leaving behind the 'Pine Curtain' as a form of escape.
Historically, the East Texas economy has been led by lumber, cotton, cattle, and oil. Prior to the discovery of the East Texas Oil Field, cotton, lumber and cattle were the predominant source of economic gains and stability. Needs of local farmers contributed greatly to the establishment of local towns and trading posts. As with many parts of the nation, the chosen paths of railroads often determined the continuation of many towns. At the beginning of the 20th century, the oil fields were discovered and oil became accessible, which changed the future of the region.
In the decades leading to the new millennium, crude oil production in the East Texas Oil Field, the largest oil field in the United States, somewhat decreased. In turn, the number of high-paying jobs for uneducated workers also decreased. During the 20th century, local groceries, general stores, and cafes were replaced with franchise department stores, retail chains, and fast-food restaurants. Due to the decline of oil production, many small towns closed cafés and gas stations, some of which were replaced with cash loan shops and pawn shops. 
Tourism has not been a highly significant source of economic activity in East Texas, although several high-traffic corridors pass through East Texas, which have aided economic development along those routes. These include: Interstate 30 (from Dallas through Texarkana), Interstate 20 (through Dallas and on through Shreveport), Interstate 10 (through Houston and Beaumont into Louisiana), Interstate 45 (through Houston up to Dallas), and U.S. Highway 59 (through Houston and north past Texarkana; in process of being upgraded along most of the route to Interstate 69).
In recent years, the region has become home to many patent-holding companies, due to its legal system being particularly friendly to patent holders and hostile to out-of-state tech defendants. 
The region also contains Sam Houston State University in Huntsville and Stephen F. Austin State University in Nacogdoches, which help contribute millions of dollars into the Deep East Texas economy. Texas A&M University-Texarkana, University of Texas at Tyler, LeTourneau University, and East Texas Baptist University are a few of the smaller universities in East Texas. Texas A&M University-Commerce is right outside East Texas and is formerly known as East Texas State University, while A&M-Texarkana was a branch campus of ETSU.
- List of geographical regions in Texas
- List of Texas regions
- List of museums in East Texas
- East Texas Oil Field
- Texas Country Music Hall of Fame
- Texas State Railroad
- Battle of the Piney Woods
- Southwest Junior College Conference
- First Monday Trade Days of Canton, Texas
- Golden Triangle (Texas)
- United States District Court for the Eastern District of Texas
- E.H. Johnson. "East Texas". Handbook of Texas Online. Texas State Historical Association. Retrieved April 12, 2017.
- "The Regions of Texas". Texas Counties. net. Retrieved 16 October 2014.
- Arthur Raper, "The Black Belt", Southern Spaces, 2004
- "Black Belt Fact Book". University of Alabama. Archived from the original on 3 November 2007.
- " Weather." Handbook of Texas. Retrieved on September 28, 2009
- "Museum of East Texas". Handbook of Texas Online. Retrieved 2007-02-07.
- "East Texas Storm Mission Statement". East Texas Storm Mission Statement. Retrieved 2014-10-18.
- Dougan, Michael (1988). East Texas : tales from behind the pine curtain (1st ed.). Seattle: Real Comet Press. ISBN 0941104257.
- Connor, Gary. "'Life Behind the Pine Curtain: Thoughts from an Ol' East Texas Philosopher'". Palestine Herald-Press.
- Knight, Paul (September 22, 2009). "Superthief". p. 1. Retrieved September 28, 2009.
- Knight, Paul (September 22, 2009). "Superthief". p. 2. Retrieved September 28, 2009.
- Joe Mullin (December 2, 2015). "Why East Texas courts are back on "top" for patent lawsuits". Retrieved November 2, 2015.
- CHINQUA WHERE? The Spirit of Rural America, 1947-1955, ISBN 978-0-9729655-0-7 by Fred B. McKinley.
- Black Gold to Bluegrass: From the Oil Fields of Texas to Spindletop Farm of Kentucky, ISBN 1-57168-946-X by Fred B. McKinley and Greg Riley.
- Gone to Texas: Genealogical Abstracts from The Telegraph and Texas Register 1835-1841, compiled by Kevin Ladd.
- The EAST TEXAS SUNDAY DRIVE Book, by Bob Bowman ISBN 1-878096-00-1.
- Wild Flowers of the Big Thicket, East Texas, and Western Louisiana, by Geyata Ajilvsgi ISBN 0-89096-065-8.
- Two centuries in East Texas: A history of San Augustine County and surrounding territory from 1685 by George Louis Crocket (Author) OCLC 15211641
- The Last Boom: The Exciting Saga of the Discovery of the Greatest Oil Field in America by James Anthony Clark (Author) and Michel T. Halbouty (Author) ISBN 978-0-39-448232-3.
|Wikimedia Commons has media related to East Texas.|
- East Texas from the Handbook of Texas Online
- East Texas Historical Association
- Sights of Interest in East Texas
- 1840 Map of East Texas From East Texas Digital Archives and Collections
- Texas Heritage Society
- KWJB RADIO the official website