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Find county GIS and property maps

Browse official GIS tools, assessor map information and county map referrals. Some entries provide instructions or map indexes rather than an interactive GIS viewer.

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Start with the jurisdiction of the property. County permit offices may serve only unincorporated areas.
Use the official map and confirm project requirements with the planning or building office.

1 guide with reviewed service links · Marin

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California58 counties

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U.S. Census boundaries via U.S. Atlas · 2017 edition, simplified for display.

County government · Marin

Assessor-Recorder-County Clerk

Assessor

Assessor mappingOfficial instructions

Officially linked county property-map resource. This verifies the referral and stated label; interactive layers, parcel results, legal boundaries, buildability and application eligibility are not determined here.

Source checked October 26, 2026

Marin County · Marin County — assessor recorder clerk (opens in a new tab)

Official property-office map referral: Assessor mapping

Assessor mapping

Saved evidence: 4414defaa2ba0a4e · Agent source review

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