Cassia County's estimated 2026 population is 26,294 with a growth rate of 0.61% in the past year according to the most recent United States census data. Cassia County is the 16th largest county in Idaho. The 2010 population was 23,080 and has seen a growth of 13.93% since that time.
Data after 2023 is projected based on recent change
The racial composition of Cassia County includes 72.3% White, 13.41% other race, and smaller percentages for Native American, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
White (72.3%)
Other race (13.41%)
Two or more races (12.89%)
Native American (1.01%)
Asian (0.29%)
Black or African American (0.08%)
Native Hawaiian or Pacific Islander (0.02%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 18,194 | 72.3% |
| Other race | 3,375 | 13.41% |
| Two or more races | 3,243 | 12.89% |
| Native American | 254 | 1.01% |
| Asian | 74 | 0.29% |
| Black or African American | 21 | 0.08% |
| Native Hawaiian or Pacific Islander | 4 | 0.02% |
Married
Widowed
Divorced
Separated
Never Married
Cassia County's average per capita income is $41,121. Household income levels show a median of $67,042. The poverty rate stands at 10.27%.
Name | Median | Mean |
|---|---|---|
| Married Families | $88,585 | - |
| Families | $76,731 | $95,643 |
| Households | $67,042 | $88,788 |
| Non Families | $31,173 | $59,911 |
Average Income
Median Household Income
Poverty Rate
