Ada County
| Use attributes for filter ! | |
| Area | 2745 |
|---|---|
| Population | 456,849 (2017) |
| County seat | Boise |
| Unemployment rate | 2. 1% (May 2019) |
| Points of interest | Oregon Trail |
| Old Idaho Penitentiary Site | |
| Date of Reg. | |
| Date of Upd. | |
| ID | 1062712 |
About Ada County
Ada County is a county in the southwestern part of the U. S. state of Idaho. As of the 2010 United States Census, the county had a population of 392,365, making it the state's most populous county, with 23. 3% of the state's 2010 population. The county seat and largest city is Boise, which is also the state capital.