Ada County's estimated 2026 population is 554,017 with a growth rate of 1.67% in the past year according to the most recent United States census data. Ada County is the largest county in Idaho. The 2010 population was 393,369 and has seen a growth of 40.84% since that time.
Data after 2023 is projected based on recent change
The racial composition of Ada County includes 84.76% White, and smaller percentages for other race, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (84.76%)
Two or more races (7.82%)
Other race (2.79%)
Asian (2.53%)
Black or African American (1.28%)
Native American (0.63%)
Native Hawaiian or Pacific Islander (0.18%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 430,629 | 84.76% |
| Two or more races | 39,743 | 7.82% |
| Other race | 14,198 | 2.79% |
| Asian | 12,871 | 2.53% |
| Black or African American | 6,510 | 1.28% |
| Native American | 3,211 | 0.63% |
| Native Hawaiian or Pacific Islander | 890 | 0.18% |
Married
Widowed
Divorced
Separated
Never Married
Ada County's average per capita income is $52,567. Household income levels show a median of $88,907. The poverty rate stands at 8.53%.
Name | Median | Mean |
|---|---|---|
| Married Families | $119,551 | $156,615 |
| Families | $107,531 | $141,995 |
| Households | $88,907 | $121,034 |
| Non Families | $55,357 | $73,821 |
Average Income
Median Household Income
Poverty Rate
