Stanislaus County, California

County seat: Modesto · Population 557,719 (2025) · 1,496 sq mi

Stanislaus County is the 16th most populous of California's 58 counties, with 557,719 people (2025 estimate). Its county seat is Modesto. The map shows its 9 cities and towns and the 7 neighboring counties.

Map of Stanislaus County, California with cities, towns and the county boundary
Stanislaus County, California with its cities and towns, unincorporated communities (CDPs) and neighboring counties. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).
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Stanislaus County facts

County seat
Modesto
Population (2025 estimate)
557,719 +0.8% since 2020
Land area
1,496 sq mi 30th largest of 58
Water area
18 sq mi
Population density
373 per sq mi
Established
1854
Named after
Estanislao Leader of the Lakisamni tribe
Largest city
Modesto 219,652
Median household income
$81,468
Cities and towns
9 plus 24 CDPs
ZIP codes
28
Time zone
Pacific
FIPS code
06099

Cities and towns in Stanislaus County

Stanislaus County has 9 incorporated cities, towns and villages. Populations count the people living inside Stanislaus County; cities that cross a county line also list the other counties.

NameTypePopulation 2025Also in
Modesto (county seat)City219,652
TurlockCity72,864
CeresCity48,982
PattersonCity26,587
RiverbankCity26,557
OakdaleCity23,246
NewmanCity12,453
WaterfordCity9,258
HughsonCity8,051

Unincorporated communities (CDPs)

Census-designated places are communities without their own city government; the county provides their services.

CommunityPopulationAlso in
Salida13,900
West Modesto5,978
Keyes5,577
Denair4,914
Bret Harte4,757
Bystrom4,143
Empire3,429
East Oakdale2,269
Diablo Grande1,948
Del Rio1,508
Parklawn1,478
Rouse1,462
Grayson1,182
Riverdale Park1,137
Orange Blossom1,062
Airport903
Hickman844
Westley572
Cowan497
Crows Landing335
Valley Home328
La Grange91
Monterey Park Tract74
Knights Ferry64

ZIP codes in Stanislaus County

28 ZIP codes reach into Stanislaus County. ZIP codes ignore county lines, so some also cover a neighboring county.

Population of Stanislaus County, 2020–2025

Stanislaus County grew by 4,435 people (+0.8%) between April 2020 and July 2025: 10,115 more births than deaths and a net loss of 6,054 people from migration.

Year (July 1)Population
2020553,702
2021553,047
2022552,453
2023554,459
2024557,372
2025557,719

Neighboring counties

Printable Stanislaus County map

The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.

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Sources

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