Ada County, Administrative county in southwestern Idaho, US
Ada County spans 1,060 square miles across southwestern Idaho, featuring urban developments, natural reserves, and the Boise River flowing through its northern section.
The Idaho Territory legislature established Ada County on December 22, 1864, naming it after Ada Riggs, daughter of legislator H.C. Riggs, who helped found Boise.
The county maintains multiple educational institutions, including the College of Western Idaho and four school districts serving its population of over 500,000 residents.
The Ada County government offices operate from 200 West Front Street in Boise, providing administrative services, law enforcement, and public health programs.
Ada County contains portions of both the Boise National Forest and Snake River Birds of Prey National Conservation Area within its boundaries.
Location: Idaho
Inception: December 22, 1864
Capital city: Boise
Shares border with: Gem County, Boise County, Elmore County, Owyhee County, Canyon County
Website: http://adaweb.net
GPS coordinates: 43.45000,-116.24000
Latest update: May 26, 2025 21:34
Albertsons Stadium
17.4 km
Idaho State Capitol
19 km
Old Idaho State Penitentiary
18.1 km
Idaho Center
27.9 km
The Egyptian Theatre
18.6 km
Julia Davis Park
17.9 km
Zions Bank Idaho Headquarters
18.7 km
Anne Frank Human Rights Memorial
18 km
Meridian Idaho Temple
28.4 km
Morley Nelson Snake River Birds of Prey National Conservation Area
18.8 km
Cathedral of St. John the Evangelist
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Boise Art Museum
18 km
Lucky Peak State Park
17.4 km
Ahavath Beth Israel
17.3 km
Lucky Peak Lake
18 km
Jack's Urban Meeting Place
18.5 km
Idaho Botanical Garden
18 km
Ann Morrison Park
18.2 km
Old Idaho Penitentiary Site
18.1 km
Assay Office
18.3 km
Camel's Back Park
20.8 km
St. Alphonsus Hospital
18.9 km
U.S. Bank Building
18.6 km
National Weather Service Boise, Idaho
13.3 km
Kathryn Albertson Park
18.4 km
Hoff Building
18.9 km
Discovery Center of Idaho
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MK Nature Center
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