Download Sonoma County, California GIS parcel data - 188,461 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: Sonoma Value601RollYear 2025; 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 188,461 active parcels (Sonoma Value601RollYear 2025; last loaded into LandAI on 2026-05-20):
| Field | Coverage |
|---|---|
| Site addresses | 93.4% |
| Deeded acres | 99.8% |
| Calculated (GIS) acres | 100% |
| Land use | 99.8% |
| Last sale price | 72.7% |
| Sale / transfer date | 99.4% |
| Market total value | 99.8% |
| Year built | 83.7% |
| Building square footage | 99.2% |
| Legal description | 70.9% |
These are 10 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.
Sonoma County, California has 188,461 active parcels in the LandAI dataset (source data as of 2025).
Every parcel includes the standardized LandAI schema: parcel ID and geometry plus site addresses (93.4%), deeded acres (99.8%), calculated (GIS) acres (100%), land use (99.8%), last sale price (72.7%), sale / transfer date (99.4%), market total value (99.8%), year built (83.7%), 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.
Sonoma Value601RollYear 2025; last loaded into LandAI on 2026-05-20.
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