COUNTY · CA

San Joaquin County, California

San Joaquin County is a county in California with FIPS code 06077 and an estimated population of 800,965 (Census 2023), 14th largest of 58 in the state.

County facts

Name: San Joaquin County
State: California
Type: county
FIPS code: 06077
State FIPS: 06
Population (2023): 800,965
Change since 2020: +2.6%
State rank: 14 of 58

Population is the Census Bureau’s Vintage 2023 estimate.

Major cities in San Joaquin County

Stockton

Other counties in California

Los Angeles County San Diego County Orange County Riverside County San Bernardino County Santa Clara County Alameda County Sacramento County All 58

Questions

What is the FIPS code for San Joaquin County?

San Joaquin County, California has the five-digit FIPS code 06077: 06 for the state and 077 for the county.

What state is San Joaquin County in?

San Joaquin County is in California.

How do I know if an address is in this county?

Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.

Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.