Jefferson County, ID
ID · Presidential Elections 1916–2024
Jefferson County, ID (Idaho) voted R+73.3 for Donald Trump (Republican) in the 2024 presidential election, with Trump receiving 13,481 votes (85.22%) to 1,891 (11.95%) for Harris.
This represents a D+0.4% swing toward Democrats compared to 2020. Jefferson County is classified as a deep Republican county. Jefferson County has voted Republican in every presidential election since 1952. The county has a population of approximately 33,154.
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Quick Stats
Demographics
Community Profile
Religious Composition
Source: Religion Census 2020Ancestry Groups
Source: Census ACSTop reported ancestry groups (compared to national average).
Age Distribution
Employment by Industry
Census ACSPresidential Elections
Presidential Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2024 | 11.9%(1,891) | 85.2%(13,481) | R+73.3 | D+0.4 |
| 2020 | 11.7%(1,661) | 85.4%(12,099) | R+73.6 | R+8.6 |
| 2016 | 8.5%(976) | 73.5%(8,436) | R+65.0 | D+10.5 |
| 2012 | 11.4%(1,303) | 86.9%(9,895) | R+75.5 | R+9.4 |
| 2008 | 15.7%(1,641) | 81.8%(8,540) | R+66.1 | D+8.2 |
| 2004 | 12.2%(1,084) | 86.5%(7,703) | R+74.3 | R+5.7 |
| 2000 | 14.0%(1,100) | 82.7%(6,480) | R+68.7 | R+21.4 |
| 1996 | 19.3%(1,427) | 66.5%(4,925) | R+47.3 | R+12.2 |
| 1992 | 13.7%(978) | 48.8%(3,471) | R+35.0 | D+26.6 |
| 1988 | 18.0%(1,198) | 79.6%(5,295) | R+61.6 | D+15.0 |
Source: Official state election returns via MIT Election Data + Science Lab
Presidential Margin Trend
Jefferson County, ID • 1916–2024
Senate Elections
Senate Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 9.2%(836) | 81.3%(7,396) | R+72.1 | R+0.7 |
| 2020 | 11.7%(1,647) | 83.2%(11,702) | R+71.5 | R+1.9 |
| 2016 | 10.5%(1,196) | 80.1%(9,120) | R+69.6 | R+0.5 |
| 2014 | 15.4%(1,090) | 84.6%(5,968) | R+69.1 | D+2.1 |
| 2010 | 11.7%(880) | 82.9%(6,230) | R+71.2 | R+16.9 |
| 2008 | 14.4%(1,511) | 68.7%(7,197) | R+54.3 | D+45.4 |
| 2004 | 0.0%(0) | 99.7%(8,352) | R+99.7 | R+33.9 |
| 2002 | 15.8%(1,045) | 81.6%(5,393) | R+65.8 | D+2.9 |
| 1998 | 14.8%(893) | 83.5%(5,039) | R+68.7 | R+21.4 |
| 1996 | 24.5%(1,835) | 71.8%(5,382) | R+47.3 | R+22.0 |
Source: Official state election returns via MIT Election Data + Science Lab
Governor Elections
Governor Results
| Year | Democrat | Republican | Margin | Swing |
|---|---|---|---|---|
| 2022 | 6.4%(1,160) | 72.5%(13,182) | R+66.1 | D+0.7 |
| 2018 | 15.0%(1,307) | 81.8%(7,125) | R+66.8 | R+14.7 |
| 2014 | 19.0%(1,336) | 71.0%(5,006) | R+52.1 | R+10.9 |
| 2010 | 25.5%(1,923) | 66.7%(5,024) | R+41.2 | D+4.0 |
| 2006 | 25.4%(1,880) | 70.6%(5,220) | R+45.2 | D+3.3 |
| 2002 | 24.8%(1,661) | 73.3%(4,902) | R+48.5 | D+13.3 |
| 1998 | 18.1%(1,104) | 79.8%(4,877) | R+61.8 | R+40.0 |
| 1994 | 37.3%(2,444) | 59.1%(3,872) | R+21.8 | R+15.5 |
| 1990 | 46.9%(2,324) | 53.1%(2,636) | R+6.3 | D+28.8 |
| 1986 | 31.9%(2,047) | 67.0%(4,296) | R+35.1 | R+7.4 |
Source: Official state election returns via MIT Election Data + Science Lab