California · FIPS 06035 · County seat: Susanville
Lassen County, CA GIS & Parcel Viewer
Lassen County, California parcel data lives on the Lassen County ArcGIS parcel map. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Lassen County parcel map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Lassen County ArcGIS parcel map |
|---|---|
| Type | County-run map |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Susanville |
| Population | 28,861 (2023 Census Bureau estimate) |
| Land area | 4,541 sq mi |
| FIPS code | 06035 |
About the official source
This map is published by or for Lassen County itself, so it reflects the local parcel layer rather than a third-party copy. Our October 2026 check found the map open to the public, with no account or payment needed.
How to use the Lassen County viewer
- Press the button above; an ArcGIS Experience Builder app opens in a new tab. Accept any splash or disclaimer screen.
- Search by address or parcel ID, or pan to the area.
- Select a parcel to view the information the publisher makes available.
- Explore the app's panels for layers, legends or printing.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
Lassen County by the numbers
Census Bureau figures put Lassen County at about 28,861 people (2023 estimate) on roughly 4,541 square miles of land, which is about 6.4 residents per square mile. Among California's 58 counties, it is the 47th largest by population. Its county seat is Susanville.
Nearby parcel maps
Parcels close to the edge of Lassen County can fall in the next county over. Neighboring counties:
Maps vs. surveys
The lines you see online are approximate. They're good for finding a lot and its parcel number, but a legal boundary question needs the recorded plat or a surveyor.