Benchmark locations in San Joaquin County.

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These maps represent conceptual master storm drainage plans for various areas of the County. They were created as a tool to exact fees from properties within each area that would be deposited into independent Drainage Trust Funds with the purpose of eventually having sufficient funds to build storm drainage facilities. All of these Drainage Trust Fund areas except the following have been eliminated:

• Lockeford
• Escalon
• Manteca
• Woodbridge

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Search by address to determine which County Service Area or Maintenance District you belong to.

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This layer depicts the boundaries of the United States Postal Service Zipcodes, within San Joaquin County, CA. It was obtained from the San Joaquin County Community Development GIS website (http://sjmap.org/GISDataDownload.htm).

Transportation Segments in San Joaquin County

Parcels within San Joaquin County limits. Updated: 10/2025

Storm Districts in San Joaquin County.

Elevation Certificates in San Joaquin County.

This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data.

This shapefile contains tax rate area (TRA) boundaries in San Joaquin County for the specified assessment roll year. Boundary alignment is based on the 2022 county parcel map. A tax rate area (TRA) is a geographic area within the jurisdiction of a unique combination of cities, schools, and revenue districts that utilize the regular city or county assessment roll, per Government Code 54900. Each TRA is assigned a six-digit numeric identifier, referred to as a TRA number. TRA = tax rate area number

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This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data.

Provides an estimated location of benchmarks listed in the January 1983 benchmark list in NGVD 29. Today NAVD 88 is commonly used. Assistance with conversion can be found at NOAA's website.

This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data.

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This dataset is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data.