Sonoma County

Parcel & Property Data

186,943Total Parcels

—Avg. Market Value

993,397Total Acres (measured from parcel boundaries)

About This Data

LandBrief holds 186,943 parcel records for Sonoma County, sourced from county records. Each includes the parcel boundary, and — where the county publishes them — owner, situs address, acreage, assessed values and legal description.

Data from the Sonoma County assessor roll dated January 2021, loaded August 2026. See data sources for every county’s vintage.

Explore Sonoma County

Sonoma County by the Numbers

Median parcel size: 0.18 acres
measured from mapped boundaries
90th-percentile parcel: 4.1 acres
County land area: 1,008,216 acres
U.S. Census measurement
Communities: 42
5.6% of parcels outside any incorporated place

Who Owns Sonoma County?

Share of the county’s 186,943 parcels by the kind of owner on record. Classified from owner names, so the boundaries are approximate; an entity the rules cannot place counts as an individual.

Owner type	Share of parcels
Individuals	53.2%
Companies & organizations	8.5%
Trusts & estates	35.1%
Government	2.7%
Other / unclassified	0.6%

The largest owner on record is COUNTY OF SONOMA with 1,452 parcels — see the full landowner leaderboard.

Parcel Records (~186,943 total)

Showper page

Parcel ID	Owner	Address	City	Acreage
001-192-026	HOLMBERG JON RICHARD	E 1ST ST	Cloverdale	0.31 †
001-173-010	DUTT VIKRAM TR & DUTT JUHL TR	102 E 1ST ST	Cloverdale	0.04 †
001-173-004	DUTT VIKRAM TR & DUTT JUHL TR	104 E 1ST ST	Cloverdale	0.07 †
001-123-002	CORKILL DAVID JOSEPH II TR & CORKILL KAREN PATRICI	121 E 1ST ST	Cloverdale	0.36 †
001-192-003	BELTRAN JUAN BAUTISTA & ANDREA	322 E 1ST ST	Cloverdale	0.10 †
001-195-030	MURPHY TERI RYN & STEDMAN WYATT	411 E 1ST ST	Cloverdale	0.08 †
001-192-027	ELLIS ROBERT	414 E 1ST ST #A	Cloverdale	0.27 †
001-195-031	SHERWIN RICHARD N TR & SHERWIN DORINDA B TR	415 E 1ST ST	Cloverdale	0.15 †
001-192-022	GRADDY DONALD EDWARD TR & GRADDY LOUISE MAY TR	430 E 1ST ST	Cloverdale	0.21 †
001-201-014	ROWLAND GARNET RICHARD TR & ROWLAND ANNETTE DEVERN	593 E 1ST ST	Cloverdale	0.34 †

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All 186,943 parcels in Sonoma County as a single file — free, no account needed. Shapefile, GeoJSON, GeoPackage, CSV and Parquet.

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Frequently Asked Questions

How many parcels are in Sonoma County?

The Sonoma County assessor roll on file records 186,943 parcels across 42 communities, with 5.6% lying outside any incorporated place.

Who owns the most land in Sonoma County?

COUNTY OF SONOMA holds 1,452 parcels, the most of any owner on record — the largest-landowners leaderboard ranks the top 25.

What is the typical parcel size in Sonoma County?

Measured from mapped boundaries, the median parcel is 0.18 acres, and nine parcels in ten are under 4.1 acres. Boundary-measured area closely tracks deeded acreage but is not the deed.

How much of Sonoma County is government-owned?

Government entities — federal, state, and local — hold 2.7% of the county’s parcels, classified from owner names on the roll.

How current is this data?

It comes from the Sonoma County assessor roll dated January 2021. Counties deliver on their own schedules; the methodology page explains how records are processed and the data sources page tracks every county’s vintage.

Browse by City (42)

186,943 parcels across 42 communities in Sonoma County.