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San Joaquin CountyOpen Data

San Joaquin County, California

Open data for a place to thrive.

Find, preview and download datasets from county departments, from parcels and districts to elections and budgets.

Datasets
90
Departments
4
Categories
5
File formats
8

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Department of Public WorksUpdated

Parcels

Parcels within San Joaquin County limits. Updated: 09/2026

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Department of Public WorksUpdated

SpecialDistricts

Water, Sewer, Storm, and Lighting District boundaries in San Joaquin County.

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  • GeoJSON
  • KML
Department of Public WorksUpdated

San Joaquin County: Road Closures web app

The following map of road closures occur in the unincorporated areas of San Joaquin County. Which does not include closure information from local cities or State/Federal highways.

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  • ArcGIS API
Department of Public WorksUpdated

San Joaquin County: Road Closures

The following map of road closures occur in the unincorporated areas of San Joaquin County. Which does not include closure information from local cities or State/Federal highways. Last Updated: 9/5/2025 11:05AM

  • HTML
  • ArcGIS API

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For developers

Every dataset is available through the CKAN API.

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Who publishes

County departments

All departments
  • Department of Public Works

    The overall mission of the San Joaquin County Department of Public Works is to plan, design, construct, operate and maintain the County infrastructure, which…

    71 datasets

  • Registrar of Voters

    San Joaquin County Registrar of Voters Data and Services Use Restrictions, Permissible Access, Disclaimer, Terms and Conditional Use Use Restrictions on Voter…

    11 datasets

Prototype by Datopian · not an official government website · data from opendata.sjgov.org