Idaho 2008 Presidential Election Results by County

Compiled by EveryElectionResult.com's data team · Last updated 2026-09-02

In 2008, the Republican candidate won 41 of Idaho's 44 counties.

County	Winner	Party	Votes	Vote Share	Margin	Total Votes Cast
Ada	John McCain	Republican	93,328	52.0%	6.2 pts	179,402
Adams	John McCain	Republican	1,517	65.4%	34.0 pts	2,320
Bannock	John McCain	Republican	19,356	55.1%	13.0 pts	35,105
Bear Lake	John McCain	Republican	2,377	80.8%	63.7 pts	2,943
Benewah	John McCain	Republican	2,646	63.5%	29.8 pts	4,164
Bingham	John McCain	Republican	12,230	71.3%	45.5 pts	17,155
Blaine	Barack Obama	Democratic	6,947	65.7%	33.2 pts	10,571
Boise	John McCain	Republican	2,433	64.5%	31.6 pts	3,773
Bonner	John McCain	Republican	11,145	57.0%	16.9 pts	19,547
Bonneville	John McCain	Republican	29,334	70.3%	43.0 pts	41,703
Boundary	John McCain	Republican	3,078	65.0%	33.7 pts	4,733
Butte	John McCain	Republican	1,056	74.9%	52.3 pts	1,410
Camas	John McCain	Republican	422	68.3%	38.0 pts	618
Canyon	John McCain	Republican	42,752	66.5%	35.2 pts	64,246
Caribou	John McCain	Republican	2,656	80.4%	63.7 pts	3,302
Cassia	John McCain	Republican	6,309	80.5%	63.5 pts	7,842
Clark	John McCain	Republican	305	81.3%	64.3 pts	375
Clearwater	John McCain	Republican	2,569	65.8%	34.8 pts	3,906
Custer	John McCain	Republican	1,694	72.0%	46.0 pts	2,352
Elmore	John McCain	Republican	5,665	67.2%	36.4 pts	8,436
Franklin	John McCain	Republican	4,246	83.7%	71.9 pts	5,073
Fremont	John McCain	Republican	4,700	79.9%	61.8 pts	5,880
Gem	John McCain	Republican	5,585	70.3%	43.0 pts	7,947
Gooding	John McCain	Republican	3,765	69.8%	42.2 pts	5,391
Idaho	John McCain	Republican	5,895	71.8%	47.2 pts	8,210
Jefferson	John McCain	Republican	8,540	81.8%	66.1 pts	10,441
Jerome	John McCain	Republican	4,897	71.5%	45.3 pts	6,847
Kootenai	John McCain	Republican	38,387	62.0%	26.3 pts	61,932
Latah	Barack Obama	Democratic	9,195	51.9%	6.8 pts	17,714
Lemhi	John McCain	Republican	2,938	71.6%	45.7 pts	4,105
Lewis	John McCain	Republican	1,275	70.7%	44.1 pts	1,804
Lincoln	John McCain	Republican	1,232	65.9%	36.7 pts	1,870
Madison	John McCain	Republican	11,131	85.2%	72.8 pts	13,057
Minidoka	John McCain	Republican	5,087	73.8%	50.2 pts	6,890
Nez Perce	John McCain	Republican	10,357	58.1%	18.1 pts	17,823
Oneida	John McCain	Republican	1,724	79.7%	62.1 pts	2,162
Owyhee	John McCain	Republican	3,024	74.5%	51.3 pts	4,058
Payette	John McCain	Republican	5,988	69.5%	41.5 pts	8,613
Power	John McCain	Republican	1,754	61.7%	25.6 pts	2,842
Shoshone	John McCain	Republican	2,953	52.1%	7.6 pts	5,666
Teton	Barack Obama	Democratic	2,302	49.4%	0.8 pts	4,658
Twin Falls	John McCain	Republican	19,032	67.1%	36.7 pts	28,344
Valley	John McCain	Republican	2,772	52.3%	6.9 pts	5,296
Washington	John McCain	Republican	3,168	70.3%	42.8 pts	4,506

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Frequently Asked Questions

Which party won the most counties in Idaho in 2008?

The Republican candidate won 41 of Idaho's 44 counties in 2008, with 3 counties going to the other major party.

Which Idaho county had the closest presidential result in 2008?

Teton had the closest margin in Idaho in 2008, with Barack Obama (Democratic) winning by 0.8 points out of 4,658 total votes cast.

Which Idaho county had the widest presidential margin in 2008?

Madison had the widest margin in Idaho in 2008, with John McCain (Republican) winning by 72.8 points.

How many counties are included in Idaho's 2008 presidential results?

This page covers 44 counties in Idaho for the 2008 presidential election, based on MEDSL/EveryElectionResult.com county-level returns.