McDuffie County, Georgia
McDuffie County Courthouse in Thomson
Location within the U.S. state of Georgia
Georgia's location within the U.S.
|Named for||George McDuffie|
|• Total||266 sq mi (690 km2)|
|• Land||257 sq mi (670 km2)|
|• Water||8.9 sq mi (23 km2) 3.4%%|
| • Estimate |
|• Density||85/sq mi (33/km2)|
|Time zone||UTC−5 ( Eastern)|
|• Summer ( DST)||UTC−4 ( EDT)|
McDuffie County is a county located in the U.S. state of Georgia. As of the 2010 census, the population was 21,875.  The county seat is Thomson.  The county was created on October 18, 1870  and named after the South Carolina governor and senator George McDuffie. 
Most communities located in the county were founded before the county was created. Some have faded into obscurity. The Historic Wrightsborough Foundation preserves the memory of the early settlement of Wrightborough, which was occupied 1768 to 1920. 
Most of the southern half of McDuffie County, south of Thomson, is located in the Brier Creek sub-basin of the Savannah River basin, except for a slice of the eastern portion of the county, north of Dearing and along a north–south line running through Boneville, which is located in the Middle Savannah River sub-basin of the Savannah River basin. The northern half of McDuffie County, north of Thomson, is located in the Little River sub-basin of the same Savannah River basin. 
- Lincoln County (northeast)
- Columbia County (east)
- Richmond County (southeast)
- Jefferson County (south)
- Warren County (west)
- Wilkes County (northwest)
|U.S. Decennial Census
1790-1960  1900-1990 
1990-2000  2010-2013 
As of the census  of 2000, there were 21,231 people, 7,970 households, and 5,857 families living in the county. The population density was 32/km2 (82/mi2). There were 8,916 housing units at an average density of 13/km2 (34/mi2). The racial makeup of the county was 60.78% White, 37.52% Black or African American, 0.89% Native American, 0.2% Asian, 0.03% Pacific Islander, 0.32% from other races, and 0.76% from two or more races. 1.34% of the population were Hispanic or Latino of any race.
There were 7,970 households, out of which 36.30% had children under the age of 18 living with them, 49.70% were married couples living together, 19.20% had a female householder with no husband present, and 26.50% were non-families. 23.20% of all households were made up of individuals, and 9.40% had someone living alone who was 65 years of age or older. The average household size was 2.62 and the average family size was 3.08.
In the county, the population was spread out, with 27.90% under the age of 18, 8.60% from 18 to 24, 28.40% from 25 to 44, 23.20% from 45 to 64, and 11.90% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 89.40 males. For every 100 females age 18 and over, there were 84.50 males.
The median income for a household in the county was $31,920, and the median income for a family was $38,235. Males had a median income of $30,147 versus $20,499 for females. The per capita income for the county was $18,005. About 14.10% of families and 18.40% of the population were below the poverty line, including 26.00% of those under age 18 and 20.00% of those age 65 or over.
As of the 2010 United States Census, there were 21,875 people, 8,289 households, and 5,964 families living in the county.  The population density was 85.0 inhabitants per square mile (32.8/km2). There were 9,319 housing units at an average density of 36.2 per square mile (14.0/km2).  The racial makeup of the county was 57.2% white, 39.8% black or African American, 0.3% Asian, 0.3% American Indian, 0.1% Pacific islander, 0.9% from other races, and 1.4% from two or more races. Those of Hispanic or Latino origin made up 2.2% of the population.  In terms of ancestry, 18.4% were American, 8.3% were English, 6.0% were Irish, and 5.4% were German. 
Of the 8,289 households, 36.7% had children under the age of 18 living with them, 45.0% were married couples living together, 21.4% had a female householder with no husband present, 28.0% were non-families, and 24.2% of all households were made up of individuals. The average household size was 2.60 and the average family size was 3.07. The median age was 38.4 years. 
The median income for a household in the county was $35,414 and the median income for a family was $42,472. Males had a median income of $34,300 versus $22,710 for females. The per capita income for the county was $17,261. About 16.0% of families and 19.5% of the population were below the poverty line, including 27.2% of those under age 18 and 20.1% of those age 65 or over. 
Typical of many counties in Georgia and the Solid South, McDuffie County mainly backed candidates of the Democratic Party in presidential elections by wide margins prior to 1964. There were several exceptions to this, firstly between 1892 and 1908 when it supported Republican William McKinley and the Populist candidacies of James B. Weaver and favorite son Thomas E. Watson.  In 1928, Herbert Hoover won the county by 9 points, and in 1960 John F. Kennedy only won by 40 votes, both thanks to anti-Catholic sentiment. In 1948 Strom Thurmond won the county due to opposition to Harry S. Truman’s civil rights proposals, while the county swung hard to support Barry Goldwater in 1964 and was won by George Wallace in 1968 due to opposition to the Civil Rights Act. Subsequently, the only times McDuffie County has failed to back a Republican candidate for president since then have been in 1976 and 1980, when Georgian Jimmy Carter was on the ticket. However, its sizeable African-American population has kept the Republican margins of victory lower than in many other rural counties in the state.
- Central Savannah River Area
- National Register of Historic Places listings in McDuffie County, Georgia
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