Alameda County, California

Alameda 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 ALAMEDA GUS Population: 1,649,060 (2024) ID: 123083	County	Official County Government	Contact: ALAMEDA CO. BOARD OF SUPVRS 3RD DISTRICT 1221 OAK ST, STE 536, OAKLAND CA 94612-4224
CITY OF OAKLAND GUS Population: 443,554 (2024) ID: 123093	Municipal	Municipal Government Within County	Contact: MAYOR 1 FRANK H OGAWA PLZ, 1ST FL, OAKLAND CA 94612-1923
CITY OF FREMONT GUS Population: 228,192 (2024) ID: 207577	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 5006, FREMONT CA 94537-5006
CITY OF HAYWARD GUS Population: 158,440 (2024) ID: 161123	Municipal	Municipal Government Within County	Contact: ASSOCIATE PLANNER 777 B ST, HAYWARD CA 94541-5007
CITY OF BERKELEY GUS Population: 121,749 (2024) ID: 123092	Municipal	Municipal Government Within County	Contact: PUBLIC INFORMATION OFFICER, CITY MAN 2180 MILVIA ST, BERKELEY CA 94704-1193
CITY OF SAN LEANDRO GUS Population: 86,571 (2024) ID: 123094	Municipal	Municipal Government Within County	Contact: COMMUNICATIONS & COMMUNITY RELATIONS 835 E 14TH ST, SAN LEANDRO CA 94577-3782
CITY OF LIVERMORE GUS Population: 84,867 (2024) ID: 161124	Municipal	Municipal Government Within County	Contact: MAYOR 1052 S LIVERMORE AVE, LIVERMORE CA 94550-4899
CITY OF ALAMEDA GUS Population: 78,795 (2024) ID: 161122	Municipal	Municipal Government Within County	Contact: MAYOR 2263 SANTA CLARA AVE, RM 120, ALAMEDA CA 94501-4477
CITY OF PLEASANTON GUS Population: 75,664 (2024) ID: 161126	Municipal	Municipal Government Within County	Contact: PLANNING MANAGER PO BOX 520, PLEASANTON CA 94566-0802
CITY OF DUBLIN GUS Population: 70,544 (2024) ID: 207578	Municipal	Municipal Government Within County	Contact: SENIOR PLANNER 100 CIVIC PLZ, DUBLIN CA 94568-2658
CITY OF UNION CITY GUS Population: 66,196 (2024) ID: 183859	Municipal	Municipal Government Within County	Contact: CITY MANAGER 34009 ALVARADO NILES RD, UNION CITY CA 94587-4497
CITY OF NEWARK GUS Population: 46,254 (2024) ID: 184434	Municipal	Municipal Government Within County	Contact: MAYOR 37101 NEWARK BLVD, NEWARK CA 94560-3796
CITY OF ALBANY GUS Population: 19,439 (2024) ID: 183819	Municipal	Municipal Government Within County	Contact: MAYOR 1000 SAN PABLO AVE, ALBANY CA 94706-2295
CITY OF EMERYVILLE GUS Population: 13,912 (2024) ID: 193102	Municipal	Municipal Government Within County	Contact: OFFICE STAFF 1333 PARK AVE, EMERYVILLE CA 94608-3517
CITY OF PIEDMONT GUS Population: 10,816 (2024) ID: 161125	Municipal	Municipal Government Within County	Contact: CITY CLERK 120 VISTA AVE, PIEDMONT CA 94611-4031