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A discussion (and a bit of action) has been started about standardizing the tables for all the state's NRHP lists. Discussion can be found here. Input is encouraged! Murderbike ( talk) 10:04, 25 February 2008 (UTC) reply

Perhaps the counties can be grouped into regions, perhaps by the state's official tourism regions.

• North (see Idaho Panhandle which would include North Central too)

• Boundary 3, Bonner 16, Kootenai 42, Benewah 9, Shoshone 22, total=92 NRHPs

• North Central (see North Central Idaho)

• Latah 53, Nez Perce 30, Lewis 4, Clearwater 4, Idaho 40, total=131

• Southwest (see Southwestern Idaho)

• Adams 7, Valley 25, Washington 30, Payette 15, Gem 10, Boise 4, Canyon 46, Ada (which includes city of Boise) 157, Elmore 22, Owyhee 14, total without Ada=173
• vs. Ada=157

Note about 21 in Ada are not in city of Boise, so could split Boise 136 vs. rest 194.

Or perhaps split Southwest into the six upper counties vs. four lower counties vs. Boise?

• Upper: Adams 7, Valley 25, Washington 30, Payette 15, Gem 10, Boise 4, total=91
• vs. Lower: Ada (exclusive of Boise city) 21, Elmore 22, Owyhee 14, total without Ada=57
• vs. city of Boise 136

Or perhaps split Southwest into the five upper counties vs. five lower counties vs. Boise?

• Upper: Adams 7, Valley 25, Washington 30, Payette 15, Gem 10, total=87
• vs. Lower: , Boise 4, Ada (exclusive of Boise city) 21, Elmore 22, Owyhee 14, total without Ada=61. Perhaps a "local"-knowledgeable person would say whether it is important to keep Boise county together with Ada County (which includes city of Boise) or otherwise how to split Southwest.
• vs. city of Boise 136

• Central (see Central Idaho)

• Lemhi 15, Custer 37, Butte 3, Camas 1, Blaine 23, total=79

• South Central

• Gooding 13, Lincoln 41, Minidoka 3, Jerome 65, Twin Falls 40, Cassia 7, total=169

• East (see Eastern Idaho which includes next one too)

• Clark 4, Fremont 12, Jefferson 5, Madison 3, Teton 5, Bingham 17, Bonneville 31, total=77

• South east (see Eastern Idaho which includes preceding one too)

• Power 12, Bannock 29, Caribou 8, Oneida 7, Franklin 10, Bear Lake 92, total=158

Note, by the way, Bingham county (with 17) is on the margin to be included above or below, if it was just me guessing how to split. If pushed down, that would make the split more imbalanced though.

Grand total 1034 for state means about 148 is average for each of 7, or average about 128 if Ada is separated and hence there are 8 groups, or average of about 115 if there are 9 groups.

-- do ncr am 22:27, 4 July 2017 (UTC) reply

Revised to split Southwest into 5 counties vs. 5 counties vs. city of Boise then yields 9 groups with sizes of 92, 131, 87, 61, 136, 79, 169, 77, and 158, that's perhaps pretty good. -- do ncr am 22:43, 5 July 2017 (UTC) reply

Template:Idaho includes links for several of these, and some regions not corresponding to counties. -- do ncr am 23:06, 4 July 2017 (UTC) reply