Sierra County GIS Maps
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Sierra County, California, has 3,236 residents and covers 953.2 square miles. The population declined 0.1% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Sierra County is 06091.
Loyalton is the county's largest population center. Sierra County also includes 8 zip codes, 1 public school district and 12 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers and sample data. Paid packages add full layers, analytics and database files.
Sierra County Trends
- Population
- 3,236▾
- Median Home Value
- $334,100▴
- K-12 Enrollment
- 414▴
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Sierra 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.
Sierra County Population
Sierra County had 3,236 residents in 2020. That was 0.1% lower than in 2010. Sierra County had 319 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 3 people per square mile. Some of the county's most populated postal areas include Loyalton, North San Juan and Downieville.
Population Trend in Sierra County CA
Sierra County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Sierra County Zip Codes
Sierra County has 8 zip codes. Some of the county's most populated zip codes include Loyalton (96118), North San Juan (95960) and Downieville (95936). Loyalton is the largest zip by population, with about 1,447 residents or 45% of the county total. Together, the three largest zips account for about 79% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Sierra County CA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 96118 | Loyalton | 1,447 | ▾ -11.1% |
| 95960 | North San Juan | 762 | ▾ -4.3% |
| 95936 | Downieville | 361 | ▴ 2.6% |
| 96124 | Calpine | 343 | ▴ 5.2% |
| 96125 | Sierra City | 291 | ▴ 12.8% |
| Download all zip code data | |||
Sierra County Zip Code populations and trends per most recent census data.
Sierra County Demographics
Sierra County has a median age of 56, which makes the county a little older than California overall. About 12.8% of residents are under 18, while 34.5% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 65 and over at about 34.5% of the population, which points to an older population profile. About 24.4% of adults have a bachelor's degree or higher, above the statewide figure of 36.5%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Sierra County CA
Median Age
56
Under 18
12.8%
Age 65+
34.5%
Bachelor's+
24.4%
Sierra County School Districts
Sierra County is served by 1 public school district with 414 students enrolled in 2024. Several larger districts account for a substantial share of students across the county map area. Those three districts account for about 100% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.
Largest School Districts by Enrollment in Sierra County CA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Sierra-Plumas Joint Unified School District | 414 | 100% | ▴ 2.7% |
| Download all school district data | |||
Sierra County school district enrollment and trends per most recent NCES reporting data.
Sierra County Housing & Real Estate
Sierra County has a median home value of $334,100 and a median gross rent of $1,181. About 78% 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 $445,000 and homes spent about 164 days on the market.
Sierra County Housing Mix
Sierra County housing mix: owner, renter and vacant units.
Sierra County Housing Trends
Sierra County median home value and rent trend (last 5 years).
Businesses in Sierra County, CA
Sierra County has 239 business listings across 90 categories. The largest categories in Sierra County business listings are Structure And Geography (22, 9.2%), Campgrounds & RV Parks (17, 7.1%), and Lake (17, 7.1%). The full Sierra County business listings dataset includes names, categories, addresses and contact details where available. Sierra County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Sierra County, CA
| Category | Businesses | Share |
|---|---|---|
| Structure And Geography | 22 | 9.2% |
| Campgrounds & RV Parks | 17 | 7.1% |
| Lake | 17 | 7.1% |
| Mountain | 9 | 3.8% |
| Lodge | 8 | 3.3% |
| Hotels | 8 | 3.3% |
| Parks & Recreation | 6 | 2.5% |
| Churches & Religious Organizations | 6 | 2.5% |
| Landmark And Historical Building | 5 | 2.1% |
| History Museum | 5 | 2.1% |
Sierra County Business Listings
| Business | Category | City |
|---|---|---|
| Genasci Ranch | Agricultural Cooperatives | Loyalton |
| Sierra Valley Feed & Ranch Supply | Agricultural Service | Sierraville |
| Sierraville Dearwater Airport | Airport | Sierra County |
| JADAAs Kitchen | American Restaurants | Downieville |
| Lombardi Mercantile | Antique Store | Loyalton |
| Coin Cloud Bitcoin ATM | ATMs | Loyalton |
| St. Charles Place | Bars & Nightlife | Downieville |
| Casey's Place | Bar And Grill Restaurant | Alleghany |
| The Top Story | Bed And Breakfast | Loyalton |
| Downieville Outfitters | Bicycle Shop | Downieville |
| Download Sierra County business listings | ||
Sierra County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Sierra County Basemaps
Sierra 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.
Get the Full Sierra County Data Package
This page shows a preview of what's included in the Sierra County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Sierra County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.