San Diego County, California

San Diego 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 SAN DIEGO GUS Population: 3,298,799 (2024) ID: 161111	County	Official County Government	Contact: HUMAN RESOURCES 5530 OVERLAND AVE, STE 210, SAN DIEGO CA 92123-1204
CITY OF SAN DIEGO GUS Population: 1,404,452 (2024) ID: 207598	Municipal	Municipal Government Within County	Contact: ECONOMIC RESEARCH COORDINATOR 202 C ST, FL 11, SAN DIEGO CA 92101-3873
CITY OF CHULA VISTA GUS Population: 278,546 (2024) ID: 211212	Municipal	Municipal Government Within County	Contact: ASSISTANT CITY MANAGER 276 4TH AVE, CHULA VISTA CA 91910-2699
CITY OF OCEANSIDE GUS Population: 170,941 (2024) ID: 161256	Municipal	Municipal Government Within County	Contact: CITY MANAGER 300 N COAST HWY, OCEANSIDE CA 92054-2859
CITY OF ESCONDIDO GUS Population: 148,847 (2024) ID: 161255	Municipal	Municipal Government Within County	Contact: CITY MANAGER 201 N BROADWAY, ESCONDIDO CA 92025
CITY OF CARLSBAD GUS Population: 113,575 (2024) ID: 161254	Municipal	Municipal Government Within County	Contact: PRINCIPAL PLANNER 1200 CARLSBAD VILLAGE DR, CARLSBAD CA 92008-1989
CITY OF EL CAJON GUS Population: 103,291 (2024) ID: 183842	Municipal	Municipal Government Within County	Contact: MAYOR 200 CIVIC CENTER WAY, EL CAJON CA 92020-3996
CITY OF VISTA GUS Population: 99,322 (2024) ID: 211981	Municipal	Municipal Government Within County	Contact: COMMUNICATIONS OFFICER 200 CIVIC CENTER DR, VISTA CA 92084-6275
CITY OF SAN MARCOS GUS Population: 96,620 (2024) ID: 161257	Municipal	Municipal Government Within County	Contact: PRINCIPAL PLANNER 1 CIVIC CENTER DRIVE, SAN MARCOS CA 92069-2918
CITY OF ENCINITAS GUS Population: 61,137 (2024) ID: 183843	Municipal	Municipal Government Within County	Contact: MAYOR 505 S VULCAN AVE, ENCINITAS CA 92024-3699
CITY OF LA MESA GUS Population: 60,767 (2024) ID: 211213	Municipal	Municipal Government Within County	Contact: COMMUNITY DEVELOPMENT PROGRAM COORDI 8130 ALLISON AVE, LA MESA CA 91942-5502
CITY OF SANTEE GUS Population: 59,104 (2024) ID: 123152	Municipal	Municipal Government Within County	Contact: MAYOR 10601 N MAGNOLIA AVE, SANTEE CA 92071-1222
CITY OF NATIONAL CITY GUS Population: 58,460 (2024) ID: 123150	Municipal	Municipal Government Within County	Contact: PRINCIPAL PLANNER 1243 NATIONAL CITY BLVD, NATIONAL CITY CA 91950-4301
CITY OF POWAY GUS Population: 49,435 (2024) ID: 100729	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 789, POWAY CA 92074-0789
CITY OF LEMON GROVE GUS Population: 27,867 (2024) ID: 201368	Municipal	Municipal Government Within County	Contact: FINANCE DIRECTOR 3232 MAIN ST, LEMON GROVE CA 91945-1705
CITY OF IMPERIAL BEACH GUS Population: 25,568 (2024) ID: 207597	Municipal	Municipal Government Within County	Contact: CITY PLANNER 825 IMPERIAL BEACH BLVD, IMPERIAL BEACH CA 91932-2797
CITY OF CORONADO GUS Population: 18,031 (2024) ID: 201367	Municipal	Municipal Government Within County	Contact: CITY MANAGER 1825 STRAND WAY, CORONADO CA 92118-3099
CITY OF SOLANA BEACH GUS Population: 12,868 (2024) ID: 183864	Municipal	Municipal Government Within County	Contact: MAYOR 635 S HIGHWAY 101, SOLANA BEACH CA 92075-2297
CITY OF DEL MAR GUS Population: 3,902 (2024) ID: 123151	Municipal	Municipal Government Within County	Contact: MAYOR 1050 CAMINO DEL MAR, DEL MAR CA 92014-2698