San Joaquin County, CA ZIP Codes & Directory
Complete postal guide for San Joaquin County, California. Featuring the official county seat of Stockton, largest municipality Stockton, and serving 13 incorporated municipal entities.
Municipalities Located in San Joaquin County
Incorporated Cities, Towns, and Villages
Acampo
cityZIPs: 95220
Escalon
cityZIPs: 95320
Farmington
cityZIPs: 95230
French Camp
cityZIPs: 95231
Lathrop
cityZIPs: 95330
Linden
cityZIPs: 95236
Lockeford
cityZIPs: 95237
Lodi
cityZIPs: 95240, 95242
Manteca
cityZIPs: 95336, 95337
Ripon
cityZIPs: 95366
Stockton
cityZIPs: 95202, 95203 , +9 more
Tracy
cityZIPs: 95304, 95376 , +2 more
Woodbridge
cityZIPs: 95258
Active USPS ZIP Codes in San Joaquin County
Standard delivery zones and geographic service boundaries
Frequently Asked Questions About San Joaquin County, CA
What is the county seat and largest city in San Joaquin County? ▾
The official county seat of San Joaquin County is Stockton, and its largest incorporated municipality by population is Stockton.
How many cities, towns, and villages are in San Joaquin County? ▾
San Joaquin County encompasses 13 incorporated municipal entities, including 13 cities, 0 towns, and 0 villages.
What is the total population and land area of San Joaquin County? ▾
According to official U.S. Census Bureau data, San Joaquin County has a population of approximately 779,209 residents and spans an area of 1,391 square miles.
How many ZIP codes operate in San Joaquin County? ▾
There are 28 active USPS ZIP codes serving addresses within San Joaquin County, California.