Download San Mateo County, California GIS parcel data - 224,076 parcels with owner names, site & mailing addresses, acreage, land use, and sale values. Instant delivery in Shapefile, FileGDB, GeoPackage, GeoJSON & CSV. $100 per county.
Data freshness: last loaded into LandAI on 2026-05-20.
Every purchase includes all five export formats (Shapefile, FileGDB, GeoPackage, GeoJSON & CSV), standardized to the LandAI parcel schema with WGS84 (EPSG:4326) geometry. After checkout you choose which formats to generate and download them for 45 days.
Field completeness measured across 224,076 active parcels (last loaded into LandAI on 2026-05-20):
| Field | Coverage |
|---|---|
| Owner names | 98.8% |
| Site addresses | 100% |
| Calculated (GIS) acres | 100% |
| Land use | 98.8% |
| Year built | 0.4% |
| Building square footage | 0.4% |
These are 6 of the 48 standardized fields in the LandAI parcel schema. Live per-field completeness for every field is shown on this page's interactive view.
San Mateo County, California has 224,076 active parcels in the LandAI dataset.
Every parcel includes the standardized LandAI schema: parcel ID and geometry plus owner names (98.8%), site addresses (100%), calculated (GIS) acres (100%), land use (98.8%), year built (0.4%), building square footage (0.4%), and more.
Shapefile, FileGDB, GeoPackage, GeoJSON & CSV. Every $100 county purchase includes all five formats; you choose which to generate after checkout and can re-download for 45 days.
last loaded into LandAI on 2026-05-20.
Yes - 98.8% of San Mateo County parcels include a normalized owner name, along with owner mailing addresses where the county provides them.
View San Mateo County pricing & coverage | All California counties | Browse the LandAI Data Store