Checked
Custer County, ID
5 cities and towns and 5 ZIP codes in Custer County, Idaho.
Population
4,470
Land area
4,922sq mi
People per sq mi
1
ZIP codes
5
Cities and towns in Custer County
Custer County at a glance
- Custer County is 96% less dense than Idaho as a whole.
- Households here earn a median of $67,574 a year, 13% less than the Idaho figure of $77,800.
- A typical owner-occupied home is valued at $381,700 (9% below Idaho) and median rent is $691 a month.
- The biggest population centers are Challis (854), Mackay (602) and Stanley (319).
Local data for Custer County, ID
Counts from official public data
Housing and community stats
Custer County, ID, American Community Survey 2020-2024
Median household income
$67,574
Poverty rate
15.8%
Median home value
$381,700
Prices -10.0% in a year
Median rent
$691/mo
Homeownership
76.8%
Bachelor's or higher
29.3%
Median age
60.0
Average commute
17.3 min
Largest reported origins and ancestries: German Americans (893), Irish Americans (467), Scottish Americans (308).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
3.5%
Sep 2026, +0.1 pts in a year
Average annual pay
$49,724
1,601 jobs, 2025
Income per person
$57,363
BEA, 2024
Federal spending
$47.9M
FY 2026, $11,205 per person
PPP loans
$5.4M
172 loans, 1,188 jobs reported
Campaign donations
$25.3K
Itemized, 2026 cycle
How people get to work
Custer County, ID, workers 16 and older. American Community Survey 5-year estimates
- Drove alone57.1%
- Carpooled12.3%
- Public transit1.1%
- Walked2.1%
- Bicycle0.1%
- Taxi, ride-hailing, motorcycle or other0.0%
- Worked from home27.3%
Average one-way commute: 17.3 minutes for people who do not work from home.
Environment and hazard risk
Custer County, ID, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: landslide
Storm events since 1996
334
Most often heavy snow
Flood insurance policies
17
0.4% of homes, county
July high / Jan low
87° / 11°F
6.9 inches of rain a year
Hazards, floods and storm historyCheck a flood zone29 historic places
Health statistics
Share of adults in Custer County, ID, CDC PLACES estimates
Obesity
31.5%
U.S. 33.3% -1.8 pts
Diabetes
13.4%
U.S. 12.1% +1.3 pts
Smoking
12.7%
U.S. 12.8% about the same
Uninsured (18-64)
8.9%
U.S. 11.1% -2.2 pts
Cities, towns and ZIP codes in Custer County
Population shown
Frequently asked questions
- What is the largest city in Custer County, ID?
- Challis is the largest city or town in Custer County, with about 854 residents.
- How many ZIP codes are in Custer County?
- Custer County includes 5 ZIP Code Tabulation Areas, including 83226, 83227, 83235, 83251, 83278.
- What is the population of Custer County, ID?
- About 4,470 people live in Custer County, based on American Community Survey 5-year estimates.
- What counties border Custer County?
- Custer County borders Elmore County, Blaine County, Valley County, Boise County, Lemhi County, Butte County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023