California · FIPS 06091 · County seat: Downieville
Sierra County, CA GIS & Parcel Viewer
Sierra County, California parcel data lives on the Sierra County parcel map. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Sierra County parcel map ↗
Opens mydashgis.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Sierra County parcel map |
|---|---|
| Type | County-run map |
| Website | mydashgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Downieville |
| Population | 3,200 (2023 Census Bureau estimate) |
| Land area | 953 sq mi |
| FIPS code | 06091 |
Who runs this map
It is a county-level map: Sierra County or the company it hires keeps the parcel layer up to date. When we tested the link in October 2026 it opened with no login and no fee.
Finding a property on this map
- Press the button above to open the county's own web map.
- Search for the property or pan and zoom to it.
- Click the lot to bring up what the county publishes about it.
- Look for print or measure tools if you need a quick map or rough size.
Many parcel sites expect owner names last name first. If a full name finds nothing, try just the surname.
Sierra County by the numbers
Sierra County had an estimated 3,200 residents in 2023, according to the Census Bureau. With about 953 square miles of land, that works out to roughly 3.4 people per square mile. That makes it number 57 out of 58 California counties by population. Its county seat is Downieville.
Neighboring counties
Sierra County shares a border with the counties below. Each link has its own official map:
Before you rely on the lines
Keep in mind that a GIS parcel layer is a tax map, not a survey. For exact boundaries, look at the recorded deed and plat or hire a licensed land surveyor.