The Ada County Board of Commissioners will vote to approve a resolution Thursday January 27th adopting new county commissioner district boundaries. County Commissioners are elected at-large and represent all of Ada County but they must live in the district in which they run.
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. 
Welcome to the Ada County Clerk’s Office . If you have ever voted, filed paperwork for a court case, picked up a marriage license or applied for a permit in Ada County, we have helped you. We do our best each and every day to make sure your experiences working with our office go as smoothly and efficiently as possible.
Ada County Offices. 200 W. Front Street Boise, Idaho 83702. Phone: (208) 287-6840 Fax: (208) 287-6849. County Seat: Boise. Ada County Website
Welcome to the Ada County Assessor’s Office Our office strives to ensure timely and relevant information is available to site users and constituents. We are continually monitoring and updating site content to fit the needs of the public to provide an informative and transparent user-experience.
Welcome to the Ada County Treasurer’s Office! Our mission is to serve the citizens of Ada County and perform all duties impartially and efficiently. The Treasurer is responsible for the safekeeping and investment of public funds. The Treasurer serves as ex officio tax collector, responsible for the collection of property taxes levied by the ...
Our planning division processes land use applications in unincorporated Ada County and works with the Ada County Historic Preservation Council to encourage the preservation of historically and culturally significant sites and structures throughout Ada County.
The Ada County Sheriff’s Office is the largest local law enforcement agency in Idaho, with over 800 employees. That includes over 325 commissioned deputies and over 400 professional staffers. The Ada County Sheriff’s Office is committed to giving every citizen the best possible service.
And while in Ada, it was still a small increase compared to last month, that's not the case in Canyon County. In Canyon, the median sales price was down 10.3% year-over-year and down 1.4% month ...
Ada County commissioners discuss a petition to dissolve the Meridian Library District during a meeting at the Ada County Courthouse, Wednesday, March 29, 2023. Brian Myrick / Idaho Press