Idaho 2012 Presidential Election Results by County

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

In 2012, the Republican candidate won 42 of Idaho's 44 counties.

County	Winner	Party	Votes	Vote Share	Margin	Total Votes Cast
Ada	Mitt Romney	Republican	97,554	54.0%	11.3 pts	180,546
Adams	Mitt Romney	Republican	1,413	68.6%	40.6 pts	2,060
Bannock	Mitt Romney	Republican	21,010	59.6%	22.1 pts	35,260
Bear Lake	Mitt Romney	Republican	2,489	88.2%	77.5 pts	2,822
Benewah	Mitt Romney	Republican	2,596	66.8%	36.9 pts	3,884
Bingham	Mitt Romney	Republican	13,440	76.4%	54.6 pts	17,603
Blaine	Barack Obama	Democratic	5,992	58.8%	20.1 pts	10,194
Boise	Mitt Romney	Republican	2,284	66.3%	35.7 pts	3,445
Bonner	Mitt Romney	Republican	11,367	61.3%	26.3 pts	18,536
Bonneville	Mitt Romney	Republican	32,276	74.7%	51.8 pts	43,213
Boundary	Mitt Romney	Republican	3,138	69.1%	42.1 pts	4,544
Butte	Mitt Romney	Republican	1,001	77.8%	57.8 pts	1,286
Camas	Mitt Romney	Republican	402	69.6%	42.0 pts	578
Canyon	Mitt Romney	Republican	44,369	67.1%	37.1 pts	66,090
Caribou	Mitt Romney	Republican	2,608	85.5%	72.8 pts	3,052
Cassia	Mitt Romney	Republican	7,154	85.2%	72.1 pts	8,396
Clark	Mitt Romney	Republican	235	71.6%	51.5 pts	328
Clearwater	Mitt Romney	Republican	2,541	68.8%	40.8 pts	3,696
Custer	Mitt Romney	Republican	1,744	74.1%	51.6 pts	2,352
Elmore	Mitt Romney	Republican	5,227	65.3%	33.9 pts	8,001
Franklin	Mitt Romney	Republican	5,195	92.8%	87.0 pts	5,600
Fremont	Mitt Romney	Republican	4,907	84.6%	70.6 pts	5,802
Gem	Mitt Romney	Republican	5,311	70.9%	44.8 pts	7,490
Gooding	Mitt Romney	Republican	3,696	72.2%	47.1 pts	5,118
Idaho	Mitt Romney	Republican	5,921	75.6%	53.8 pts	7,837
Jefferson	Mitt Romney	Republican	9,895	86.9%	75.5 pts	11,381
Jerome	Mitt Romney	Republican	4,804	71.9%	46.5 pts	6,681
Kootenai	Mitt Romney	Republican	39,381	65.8%	34.3 pts	59,828
Latah	Barack Obama	Democratic	8,306	49.6%	4.3 pts	16,759
Lemhi	Mitt Romney	Republican	3,029	73.7%	50.3 pts	4,110
Lewis	Mitt Romney	Republican	1,173	72.7%	48.1 pts	1,614
Lincoln	Mitt Romney	Republican	1,141	68.7%	40.4 pts	1,662
Madison	Mitt Romney	Republican	13,445	93.3%	87.5 pts	14,412
Minidoka	Mitt Romney	Republican	5,442	78.0%	58.1 pts	6,973
Nez Perce	Mitt Romney	Republican	9,967	59.2%	20.9 pts	16,848
Oneida	Mitt Romney	Republican	1,838	88.0%	77.6 pts	2,089
Owyhee	Mitt Romney	Republican	2,794	75.0%	52.7 pts	3,724
Payette	Mitt Romney	Republican	6,004	70.7%	43.9 pts	8,495
Power	Mitt Romney	Republican	1,870	64.4%	30.6 pts	2,903
Shoshone	Mitt Romney	Republican	2,699	52.4%	8.2 pts	5,148
Teton	Mitt Romney	Republican	2,458	54.3%	11.8 pts	4,523
Twin Falls	Mitt Romney	Republican	19,773	70.3%	43.5 pts	28,142
Valley	Mitt Romney	Republican	2,664	54.2%	11.6 pts	4,919
Washington	Mitt Romney	Republican	3,128	72.2%	46.7 pts	4,330

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Frequently Asked Questions

Which party won the most counties in Idaho in 2012?

The Republican candidate won 42 of Idaho's 44 counties in 2012, with 2 counties going to the other major party.

Which Idaho county had the closest presidential result in 2012?

Latah had the closest margin in Idaho in 2012, with Barack Obama (Democratic) winning by 4.3 points out of 16,759 total votes cast.

Which Idaho county had the widest presidential margin in 2012?

Madison had the widest margin in Idaho in 2012, with Mitt Romney (Republican) winning by 87.5 points.

How many counties are included in Idaho's 2012 presidential results?

This page covers 44 counties in Idaho for the 2012 presidential election, based on MEDSL/EveryElectionResult.com county-level returns.