| Name | Ada County |
| State | Idaho |
| FIPS Code | 16001 |
| County Seat | Boise |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2024) | 526,690 |
| Population Growth Rate(2020-2024) | 6.02% |
| Majority Ethnicity | White 85.71% |
| Public School Majority Ethnicity | White 75% |
| Partisan Voting Index | Republican:+4 |
| Unemployment Rate (May 2026) | 3.6% |
| Sales Tax Rate (2025) | 6% |
| Area Code(s) | 208 / 986 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 85.71% |
| African American | 1.3% |
| Hispanic | 9.61% |
| Asian | 2.56% |
| Native American | 0.64% |
| Hawaiin/Pacific Islander | 0.18% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 75.39% |
| African American | 2.57% |
| Hispanic | 14.01% |
| Asian | 2.49% |
| Native American | 0.43% |
| Hawaiin/Pacific Islander | 0.4% |