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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!
- About Ada County
Ada County is the largest county by population in Idaho. We...
- Property Assessments & Records
The Ada County Assessor’s office’s staff manages a vast...
- Courts
Ada County Clerk’s Office. We are responsible for...
- County Careers
Ada County. Just starting out your career? Looking for a...
- Clerk
Ada County Clerk. The Clerk’s Office is currently undergoing...
- Departments
Ada County Department menu, a list of all department....
- Assessor
Welcome to the Ada County Assessor’s Office. Our office...
- Assessor’s Property Records
The Ada County Assessor’s Office maintains comprehensive...
- About Ada County
Ada County is the most populous county in Idaho, with Boise as its seat and capital. It covers 1,060 square miles and has a diverse geography, history, and demographics.
Ada County Website. Named for Ada Riggs, daughter of H.C. Riggs, one of the founders of Boise and a member of the Idaho Territorial Legislature who introduced legislation to move the capital from Lewiston to Boise. Boise became the capital of Idaho in 1865.
Ada County is home to Idaho's capital city, Boise, and five other municipalities, as well as rich agricultural and recreational lands. Learn about the county's history, population, government, attractions and upcoming projects.
Ada County, Idaho is a stunning destination with a wealth of outdoor activities and attractions that make it a great place to explore. Ada County is a paradise for nature lovers, offering lush forests, majestic mountains, and clear lakes.
In 2022, Ada County, ID had a population of 497k people with a median age of 38.1 and a median household income of $83,881. Between 2021 and 2022 the population of Ada County, ID grew from 485,246 to 497,494, a 2.52% increase and its median household income grew from $75,115 to $83,881, a 11.7% increase.
Ada County is a county in the U.S. state of Idaho. As of the 2020 Census, 494,967 people lived in the county. [1] That was more than any other county in Idaho. The county seat and largest city is Boise. [2] Boise is also the state capital. [3]
