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The official Ada County, Idaho, website for local government offices and departments. Ada County is a great place to live and work!
Ada County is located in the southwestern part of Idaho, United States. As of the 2021 United States census estimate, the county had a population of 511,931,  making it by far the state's most populous county; it is home to 26.8% of the state's population. The county seat and largest city is Boise,  which is also the state capital. 
Ada County Offices. 200 W. Front Street Boise, Idaho 83702. Phone: (208) 287-6840 Fax: (208) 287-6849. County Seat: Boise. Ada County Website
Contact the Clerk’s Office. Phone: 208 287-6879. Mail: 200 W Front St, Boise, ID 83702. Office: 200 W Front St, Boise, ID 83702. Email: firstname.lastname@example.org.
Interesting Ada County Facts: Ada County was established on December 22, 1864. Ada County was named after Ada Riggs, the daughter of Idaho Territorial Legislator H.C. Riggs, one of the founders of Boise. The surface area of Ada County is 1054.99 square miles. Average commute time to work in Ada County is under 20 minutes.
Idaho has transitioned statewide to the new iCourt system where citizens can search for court records, make payments, or get county contact information. This website will provide updated information and resources throughout the life of the project.