Ada County, Idaho

Ada County profile, demographic data, and geographic information.

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF

Government Unit	Unit Type	Jurisdiction Role	Contact / Address
COUNTY OF ADA GUS Population: 535,799 (2024) ID: 162014	County	Official County Government	Contact: CHAIRMAN 200 W FRONT ST, BOISE ID 83702-7399
CITY OF BOISE GUS Population: 237,963 (2024) ID: 162035	Municipal	Municipal Government Within County	Contact: ASSISTANT TO THE MAYOR PO BOX 500, BOISE ID 83701-0500
CITY OF MERIDIAN GUS Population: 139,740 (2024) ID: 162037	Municipal	Municipal Government Within County	Contact: FINANCE DEPARTMENT 33 E BROADWAY AVE, MERIDIAN ID 83642
CITY OF EAGLE GUS Population: 33,451 (2024) ID: 102376	Municipal	Municipal Government Within County	Contact: CITY CLERK TREASURER 660 CIVIC LN, EAGLE ID 83616-6833
CITY OF KUNA GUS Population: 29,127 (2024) ID: 102375	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 13, KUNA ID 83634-0013
CITY OF STAR GUS Population: 18,208 (2024) ID: 137839	Municipal	Municipal Government Within County	Contact: CITY CLERK TREAS PO BOX 130, STAR ID 83669-0130
CITY OF GARDEN CITY GUS Population: 12,936 (2024) ID: 162036	Municipal	Municipal Government Within County	Contact: CITY TREASURER 6015 N GLENWOOD ST, GARDEN CITY ID 83714