Download Alameda County, California GIS parcel data - 470,561 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: ArcGIS Parcels layer Data Last Edit Date; last loaded into LandAI on 2026-05-12.
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 470,561 active parcels (ArcGIS Parcels layer Data Last Edit Date; last loaded into LandAI on 2026-05-12):
| Field | Coverage |
|---|---|
| Site addresses | 99.9% |
| Owner mailing addresses | 99.9% |
| Calculated (GIS) acres | 100% |
| Sale / transfer date | 97.9% |
| Assessed total value | 99.9% |
| Market total value | 99.9% |
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.
Alameda County, California has 470,561 active parcels in the LandAI dataset (source data as of 2026-05-03).
Every parcel includes the standardized LandAI schema: parcel ID and geometry plus site addresses (99.9%), owner mailing addresses (99.9%), calculated (GIS) acres (100%), sale / transfer date (97.9%), assessed total value (99.9%), market total value (99.9%), 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.
ArcGIS Parcels layer Data Last Edit Date; last loaded into LandAI on 2026-05-12.
View Alameda County pricing & coverage | All California counties | Browse the LandAI Data Store