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  • FIPS 16037

Custer County, Idaho

Custer County had 4,597 residents in the Census Vintage 2024 estimate, on 4,922.2 square miles of land. It ranks 40th of 44 in Idaho by population and 3rd by land area.

Population
4,597
#40 of 44 in Idaho · #2,848 in US
Area
4,922.2 sq mi
#3 of 44 in Idaho · #82 in US
Density
0.9 / sq mi
#43 of 44 in Idaho · #3,080 in US
Median household income
$58,294
#37 of 44 in Idaho · #2,004 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Custer County within Idaho. Pin: Boise.

Measure from here

Tools and pages that start from Custer County

Custer County population, land area and income

Custer County had 4,597 residents in the Census Vintage 2024 estimate, on 4,922.2 square miles of land. It ranks 40th of 44 in Idaho by population and 3rd by land area. That works out to 0.9 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in Idaho has 15,019 residents, so Custer County has 31% of the typical county's population.

Its SAIPE 2023 median household income of $58,294 is below the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

4,597

3144th1st

2848th of 3,144 (US)

Land area

4,922 sq mi

3144th1st

82nd of 3,144 (US)

Density

0.9 / sq mi

3144th1st

3080th of 3,144 (US)

Median household income

$58,294

3143rd1st

2004th of 3,143 (US)

Rank within Idaho (44)

Population

4,597

44th1st

40th of 44 (ID)

Land area

4,922 sq mi

44th1st

3rd of 44 (ID)

Density

0.9 / sq mi

44th1st

43rd of 44 (ID)

Median household income

$58,294

44th1st

37th of 44 (ID)

How Custer County's population changed since 2020

Custer County gained 328 residents between the July 2020 and July 2024 estimates, a rise of 7.7%. That ranks 19th of 44 in Idaho for growth. The median Idaho county changed by +7.2%, and the state as a whole by +8.2%.

Since the April 2020 estimates base, Custer County recorded 150 births and 234 deaths, a natural change of -84. Net international migration added +19 and net domestic migration, people moving to or from other US counties, came to +393. The largest single component was domestic migration, which added 393 people.

4,26920204,44420214,50320224,53120234,5972024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
150
Deaths
234
Net international migration
+19
Net domestic migration
+393
Change, July 2023 to July 2024
+66

Where Custer County is

The Census internal point of Custer County is at 44.273400, -114.252300. It sits in UTM zone 11N. The map shades Idaho's 44 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Custer County outlined. Dots are towns of 1,000+ people with residents in it.

Madison County: +5.0%Idaho County: +8.0%Benewah County: +9.9%Gooding County: +3.4%Lincoln County: +8.2%Minidoka County: +4.7%Custer County: +7.7%Boundary County: +15.6%Lemhi County: +5.5%Twin Falls County: +6.8%Franklin County: +9.5%Oneida County: +9.0%Gem County: +13.4%Shoshone County: +6.6%Fremont County: +7.3%Clearwater County: +4.6%Kootenai County: +9.0%Cassia County: +4.9%Blaine County: +3.8%Clark County: +0.1%Jerome County: +7.4%Bonner County: +13.8%Elmore County: +3.7%Caribou County: +3.2%Bonneville County: +7.1%Jefferson County: +12.1%Power County: +6.3%Lewis County: +5.8%Nez Perce County: +1.7%Ada County: +7.5%Adams County: +12.9%Valley County: +7.9%Bingham County: +5.8%Bannock County: +4.3%Owyhee County: +6.2%Washington County: +9.3%Latah County: +6.4%Teton County: +10.2%Camas County: +15.0%Boise County: +12.0%Bear Lake County: +6.5%Butte County: +5.9%Canyon County: +14.5%Payette County: +8.1%
Change 2020 to 2024
  1. < +4.7%
  2. < +6.4%
  3. < +7.7%
  4. < +9.9%
  5. ≥ +9.9%
no data

Orange pin: Custer County internal point. Dark pin: Boise.

Internal point

Decimal
44.273400, -114.252300
DMS
44°16'24.24"N 114°15'8.28"W
UTM
11N 719282.5E 4905911.5N
Geohash
9rygb5sp0
Plus code
85P77PFX+93

Towns in Custer County

No incorporated place of 1,000 or more people has residents in Custer County. Its 4,597 residents live in smaller towns, census-designated places, or unincorporated land, which the subcounty estimates do not list at this size.

Counties bordering Custer County

The Census 2024 county adjacency file lists 6 neighbors for Custer County. The most populous is Elmore County, ID, with 29,729 residents. Distances run between Census internal points in a straight line.

Distance to Boise and the nearest big city

Boise is 107.6 miles WSW of Custer County's internal point in a straight line. The nearest place of 100,000 or more is Boise City, ID (population 237,963), 108.9 miles away. The nearest place of 10,000 or more is Mountain Home, ID (population 16,912), 106.9 miles away.

Custer County FIPS code

The FIPS code of Custer County is 16037: state code 16 for Idaho plus county code 037. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $58,294.

Questions people ask

What is the population of Custer County, Idaho?

The Census Vintage 2024 estimate for July 1, 2024 is 4,597. That is up 328 people (7.7%) from the July 2020 estimate of 4,269.

What is the FIPS code of Custer County?

16037. The first two digits (16) are Idaho; the last three (037) identify the county.

What is the largest town in Custer County?

No incorporated place of 1,000 or more people has residents in Custer County. Its people live in smaller towns, census-designated places or unincorporated land.

Which counties border Custer County?

6 county-equivalents border it in the Census 2024 adjacency file: Elmore County, ID; Blaine County, ID; Valley County, ID; Boise County, ID; Lemhi County, ID; Butte County, ID.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.