Ada
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Ada

County
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Details

GEOID
16001
State
ID
Population
546,141 (2025 est.)
Data Source
Census tiger
Center Coordinates
43.4512, -116.2412

Geographic Boundary

Cities & Towns (10)

place Boise City
238,429
place Meridian
142,988
place Nampa
120,384
place Caldwell
76,629
place Idaho Falls
71,785
place Pocatello
58,771
place Coeur d'Alene
58,179
place Twin Falls
56,216
place Post Falls
46,715
place Rexburg
40,334

Agencies (24)

Board of County Commissioners

Legislative Ada

Chief policy-making and administrative branch of Ada County government

Bodies

Board of County Commissioners · Commission

Assessor's Office

Executive Ada

Elected office responsible for property assessment

Bodies

Newark Municipal Council · Council

Coroner's Office

Executive Ada

Elected office responsible for death investigations

Prosecutor's Office

Executive Ada

Elected office responsible for criminal prosecution

Emergency Management

Public_safety Ada

Emergency preparedness and disaster response coordination

Parks & Waterways

Executive Ada

County parks, trails, and waterway management

Clerk's Office

Executive Ada

Elected office handling county records, elections, and budget

Treasurer's Office

Executive Ada

Elected office responsible for county funds and tax collection

Elections Office

Executive Ada

Manages voter registration, elections, and candidate filings

Solid Waste Management

Executive Ada

Landfill operations and solid waste disposal

Information Technology

Executive Ada

County technology infrastructure and support services

Paramedics

Public_safety Ada

County paramedic and emergency medical services

Juvenile Court

Judicial Ada

Juvenile justice and court services

Historic Preservation

Executive Ada

Historic sites preservation and documentation

Weed, Pest and Mosquito

Executive Ada

Noxious weed control, pest management, and mosquito abatement

Development Services

Executive Ada

Land use planning and development permitting

Human Resources

Executive Ada

County employment, recruitment, and workforce management

Operations

Executive Ada

County operations and facilities management

Procurement

Executive Ada

County purchasing and contract management

Victim Services Center

Executive Ada

Support services for crime victims

Community Guardian

Executive Ada

Guardian and conservator services for vulnerable adults

Fourth District Court

Judicial Ada

State district court serving Ada County

Sheriff's Office

Public_safety Ada

Elected office providing law enforcement services

The Bridge - Youth & Family Resources

Executive Ada

Youth and family support services

Data Completeness

60% (6/10)
Geographic boundary
Center coordinates
Wikipedia link
Budget link
Agencies (24)
Services
Legislative bodies (2)
Elected officials (4)
State abbreviation
Parent jurisdiction