Custer County's estimated 2026 population is 4,729 with a growth rate of 1.42% in the past year according to the most recent United States census data. Custer County is the 40th largest county in Idaho. The 2010 population was 4,357 and has seen a growth of 8.54% since that time.
Data after 2023 is projected based on recent change
The racial composition of Custer County includes 89.93% White, and smaller percentages for Asian, other race, Native American, Black or African American and multiracial populations.
White (89.93%)
Two or more races (5.74%)
Asian (2.65%)
Other race (0.97%)
Native American (0.43%)
Black or African American (0.27%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 3,967 | 89.93% |
| Two or more races | 253 | 5.74% |
| Asian | 117 | 2.65% |
| Other race | 43 | 0.97% |
| Native American | 19 | 0.43% |
| Black or African American | 12 | 0.27% |
Married
Widowed
Divorced
Separated
Never Married
Custer County's average per capita income is $23,782. Household income levels show a median of $56,957. The poverty rate stands at 11.55%.
Name | Median | Mean |
|---|---|---|
| Families | $72,946 | $78,912 |
| Married Families | $71,932 | - |
| Households | $56,957 | $65,974 |
| Non Families | $23,500 | $41,446 |
Average Income
Median Household Income
Poverty Rate
