ZIP codes

ZIP codes in San Joaquin County, California

San Joaquin County has 36 ZIP codes. 27 lie entirely inside it and 9 are shared with neighboring counties, so part of their land and their people are elsewhere. About 794,313 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 36; 1 more just touches the border (under 1% of their land)
Entirely inside: 27; 99% or more of their land
Shared with other counties: 9; Most with Stanislaus County (3)
Most populated ZIP: 95206; 68,558 people · Stockton
Least populated ZIP: 95253; 609 people · Victor
Largest ZIP by land: 95304; 153 sq mi · Tracy

Map of the ZIP codes in San Joaquin County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in San Joaquin County

36 ZIP codes in San Joaquin County, CA, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
95202	Stockton	7,066	100%	7,066
95203	Stockton	15,930	100%	15,930
95204	Stockton	31,035	100%	31,035
95205	Stockton	39,608	100%	39,608
95206	Stockton	68,558	100%	68,558
95207	Stockton	52,414	100%	52,414
95209	Stockton	47,409	100%	47,409
95210	Stockton	41,549	100%	41,549
95211	Stockton	765	100%	765
95212	Stockton	28,437	100%	28,437
95215	Waterloo	24,847	100%	24,847
95219	Stockton	31,713	84%	≈ 29,075
95220	Dogtown	7,931	100%	7,931
95227	—	910	100%	910
95230	Farmington	403	22%	≈ 109
95231	French Camp	3,896	100%	3,896
95236	Linden	4,490	98%	≈ 4,291
95237	Lockeford	3,639	100%	3,639
95240	Lodi	50,517	100%	50,517
95242	Lodi	28,427	100%	28,427
95253	Victor	609	100%	609
95258	Woodbridge	4,144	100%	4,144
95304	Tracy	15,841	99.9%	≈ 15,840
95320	Escalon	13,500	100%	13,500
95330	Lathrop	35,395	100%	35,395
95336	Manteca	50,185	100%	50,185
95337	Manteca	48,731	100%	48,731
95361	Oakdale	34,810	2.3%	≈ 405
95366	Ripon	18,954	100%	18,954
95376	Tracy	54,488	100%	54,488
95377	Tracy	37,739	89%	≈ 37,336
95385	—	602	2.0%	≈ 29
95391	Mountain House	25,574	31%	≈ 24,840
95632	Galt	32,493	31%	≈ 2,237
95641	Walnut Grove	2,214	3.4%	≈ 36
95686	Thornton	1,171	100%	1,171

They also touch the county with under 1% of their land, so they aren’t counted: 94505.

ZIP codes shared with other counties

These 9 ZIP codes have part of their land in another county. The first figure is the share of their land in San Joaquin County; then, where the rest lies.

95219 (Stockton): 84% here; 16% in Contra Costa County.
95230 (Farmington): 22% here; 49% in Stanislaus County and 29% in Calaveras County.
95236 (Linden): 98% here; 1.9% in Calaveras County.
95361 (Oakdale): 2.3% here; 98% in Stanislaus County.
95377 (Tracy): 89% here; 11% in Alameda County.
95385: 2.0% here; 98% in Stanislaus County.
95391 (Mountain House): 31% here; 69% in Alameda County.
95632 (Galt): 31% here; 69% in Sacramento County.
95641 (Walnut Grove): 3.4% here; 97% in Sacramento County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Stockton (11), Tracy (3), Lodi (2), Manteca (2), Dogtown (1), and Escalon (1); 20 places in all.

They start with 3 different three-digit prefixes, one per USPS sorting center: 952, 953, and 956.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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