Custer County, Idaho: Stable Rural Right county. In 2024, voted R+53%. Democratic peak: D+90 in 1896.
Key facts
- 2024 presidential margin
- R+53MIT Election Lab
- Political typology
- Stable Rural RightAkashic typology
- Population
- 4,4702024 5-year
- Median household income
- $67,5742024 5-year
- White (non-Hispanic)
- 89.1%2024 5-year
- Black
- 0.3%2024 5-year
- Hispanic / Latino
- 4.5%2024 5-year
- Peak Democratic margin
- D+90 in 1896MIT Election Lab
- Peak Republican margin
- R+59 in 2000MIT Election Lab
- Most similar
- Modoc County, CA · similarity 1.00
2024 results by precinct
2024 precinct map of Custer CountyPrecinct-level 2024 presidential results for Custer County, with each precinct boundary colored by Democratic-vs-Republican margin.
—
Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
presidential history
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | No data |
| 1880 | No data |
| 1884 | No data |
| 1888 | No data |
| 1892 | −36.3% |
| 1896 | +90.5% |
| 1900 | +38.2% |
| 1904 | −6.9% |
| 1908 | +6.4% |
| 1912 | +14.7% |
| 1916 | +30.2% |
| 1920 | −34.4% |
| 1924 | −15.0% |
| 1928 | −11.2% |
| 1932 | +30.6% |
| 1936 | +24.3% |
| 1940 | +8.1% |
| 1944 | +4.1% |
| 1948 | +1.0% |
| 1952 | −39.9% |
| 1956 | −20.7% |
| 1960 | +12.6% |
| 1964 | −0.4% |
| 1968 | −22.9% |
| 1972 | −49.9% |
| 1976 | −23.7% |
| 1980 | −52.6% |
| 1984 | −55.6% |
| 1988 | −33.6% |
| 1992 | −12.2% |
| 1996 | −26.5% |
| 2000 | −59.1% |
| 2004 | −51.0% |
| 2008 | −46.0% |
| 2012 | −51.6% |
| 2016 | −55.9% |
| 2020 | −54.3% |
| 2024 | −53.3% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 586 | 1,998 | 2,650 | ||
| R | 603 | 2,089 | 2,737 | ||
| R | 427 | 1,777 | 2,413 | ||
| R | 530 | 1,744 | 2,352 | ||
| R | 611 | 1,694 | 2,352 | ||
| R | 559 | 1,762 | 2,358 | ||
| R | 416 | 1,794 | 2,330 | ||
| R | 635 | 1,249 | 2,316 | ||
| R | 564 | 829 | 2,164 | ||
| R | 616 | 1,253 | 1,896 | ||
| R | 461 | 1,653 | 2,144 | ||
| R | 398 | 1,398 | 1,902 | ||
| R | 516 | 850 | 1,409 | ||
| R | 274 | 989 | 1,432 | ||
| R | 385 | 711 | 1,423 | ||
| R | 714 | 720 | 1,434 | ||
| D | 838 | 651 | 1,489 | ||
| R | 533 | 811 | 1,344 | ||
| R | 452 | 1,058 | 1,517 | ||
| D | 625 | 612 | 1,257 | ||
| D | 613 | 565 | 1,178 | ||
| D | 894 | 760 | 1,659 | ||
| D | 875 | 530 | 1,421 | ||
| D | 839 | 440 | 1,303 | ||
| R | 516 | 647 | 1,171 | ||
| R | 394 | 585 | 1,272 | ||
| R | 394 | 808 | 1,202 | ||
| D | 879 | 454 | 1,409 | ||
| D | 501 | 326 | 1,189 | ||
| D | 598 | 521 | 1,209 | ||
| R | 429 | 496 | 967 | ||
| D | 590 | 262 | 858 | ||
| D | 599 | 29 | 630 | ||
| O | 1 | 187 | 513 | ||
| — | — | — | — | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
English
34.2%
German
20.0%
Irish
10.4%
Scottish
6.9%
American
4.6%
French
2.4%
Polish
0.9%
Sample size too small to break out by ancestry reliably.
Multiple ancestry combinations reported; no single grouping above 1%.
American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
2024 ACS
Age distribution by sex
Median age: 60.0 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
Inflation-adjusted dollars
$67,574
Custer County ranks near the middle of US counties.
Custer County$67,574
Idaho$77,800
United States$80,734
Custer County ranks near the middle of US counties by median household income.
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
15.8%
Child poverty is below the national average.
Children under 188.5%
Working age (18–64)13.9%
Seniors (65+)32.6%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
96.4%
speak English only
Spanish2.8%
Other languages0.6%
Other Indo-European0.2%
Asian & Pacific Islander0.1%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 29.9% of residents not counted as adherents by any reporting body.
Custer County's sparse high-desert and mountain terrain anchors a small, stable electorate that has delivered Republican presidential margins above 50 points in recent cycles, making it among the most one-sided counties in the state.
The Republican margin here reached fifty-nine points in 2000. Between 2020 and 2024 the county moved one point toward the Democratic candidate; the 2024 margin was fifty-three points.
A population of 4,470, a 89% non-Hispanic-white share, and a median household income of $67,574 describe the county. The county's voting pattern over the last decade is most similar to that of Modoc County and Lemhi County.
Most similar counties
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Custer County, Idaho. Akashic. https://akashic.app/county/16037/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More stable rural right counties
Frequently asked questions
How did Custer County, Idaho vote in 2024?
In 2024, Custer County, Idaho voted Republican by 53.3 points (R+53), carried by the Republican candidate. Out of 2,650 votes cast, 586 went Democratic and 1,998 went Republican.
What is Custer County, Idaho's political typology?
Akashic places Custer County, Idaho in the "Stable Rural Right" typology — Mountain, Plains, and rural Republican counties already near their ceiling, with little further room to swing. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 38 elections in the dataset, the county has voted Democratic 11 times, Republican 22 times, and other 1 times.
When did Custer County, Idaho last vote Democratic?
The most recent presidential election in which Custer County, Idaho voted Democratic was 1960.
How many people live in Custer County, Idaho?
Custer County, Idaho has a population of 4,470 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Custer County, Idaho?
Median household income in Custer County, Idaho is $67,574 — below the national median of $80,734. The Idaho state median is $77,800.
What is the political history of Custer County, Idaho?
Akashic tracks 38 presidential elections in Custer County, Idaho from 1876 to 2024. Of those, 11 went Democratic and 22 went Republican. The county's typology — "Stable Rural Right" — captures where that record, its demographics, and its recent swing place it among American communities.