Lassen County GIS Maps

Lassen County Maps

The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.

County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.

Lassen County Population

Lassen County had 32,730 residents in 2020. That was 6.2% lower than in 2010. Lassen County had 1,098 fewer people in 2020 than it did in 2000, which points to a long-term population decline. The county is fairly spread out, with about 7 people per square mile. Some of the county's most populated postal areas include Susanville, Westwood and Janesville.

Population Trend in Lassen County CA

Lassen County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.

Lassen County Zip Codes

Lassen County has 16 zip codes. Some of the county's most populated zip codes include Susanville (96130), Westwood (96137) and Janesville (96114). Susanville is the largest zip by population, with about 22,121 residents or 68% of the county total. Together, the three largest zips account for about 87% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Lassen County CA

Lassen County Zip Code populations and trends per most recent census data.

Lassen County Demographics

Lassen County has a median age of 37.8, which is close to the California average. About 17.9% of residents are under 18, while 16% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 41.1% of the population, which points to a solid working-age base. About 13.2% of adults have a bachelor's degree or higher, above the statewide figure of 36.5%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.

Key Demographics for Lassen County CA

Lassen County School Districts

Lassen County is served by 6 public school districts with 2,576 students enrolled in 2024. The largest districts on the county map are Fall River Joint Unified, Modoc Joint Unified and Fort Sage Unified. Those three districts account for about 85% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.

Largest School Districts by Enrollment in Lassen County CA

Lassen County school district enrollment and trends per most recent NCES reporting data.

Lassen County Housing & Real Estate

Lassen County has a median home value of $259,500 and a median gross rent of $1,043. About 68% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the California median, while rents come in below the state average. In March 2026, the median listing price was $234,250 and homes spent about 132 days on the market.

Businesses in Lassen County, CA

Lassen County has 1,002 business listings across 301 categories. The largest categories in Lassen County business listings are Lake (46, 4.6%), Mountain (40, 4.0%), and Churches & Religious Organizations (28, 2.8%). The full Lassen County business listings dataset includes names, categories, addresses and contact details where available. Lassen County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Lassen County, CA

Lassen County Business Listings

Lassen County business listings sourced from Overture Maps. Includes locations with a high level of confidence.

Lassen County Basemaps

Lassen County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.

Preview a Live Package Demo

See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from California — explore the full structure before you buy.