Ada County Map
The County of Ada is located in the State of Idaho. Find directions to Ada County, browse local businesses, landmarks, get current traffic estimates, road conditions, and more. According to the 2020 US Census the Ada County population is estimated at 494,399 people. The Ada County time zone is Mountain Daylight Time which is 7 hours behind Coordinated Universal Time (UTC).
Nearby counties include Boise County, Canyon County, Elmore County, Gem County, Owyhee County.
Top cities include Boise, Meridian, Eagle, Kuna, Garden City