Trinity County GIS Maps

Trinity 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.

Trinity County Population

Trinity County had 16,112 residents in 2020. That was 16.9% higher than in 2010. Trinity County added 3,090 people between 2000 and 2020, which points to steady long-term growth. Weaverville is the largest city in the county, but it accounts for only about 23% of the total population. The county is fairly spread out, with about 5 people per square mile. Some of the county's most populated postal areas include Hayfork, Weaverville and Lewiston.

Population Trend in Trinity County CA

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

Trinity County Zip Codes

Trinity County has 13 zip codes. Some of the county's most populated zip codes include Hayfork (96041), Weaverville (96093) and Lewiston (96052). Hayfork is the largest zip by population, with about 5,574 residents or 35% of the county total. Together, the three largest zips account for about 70% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Trinity County CA

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

Trinity County Demographics

Trinity County has a median age of 54.8, which makes the county a little older than California overall. About 18.3% of residents are under 18, while 29.3% 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 29.3% of the population, which points to an older population profile. About 18% of adults have a bachelor's degree or higher, above the statewide figure of 36.5%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.

Key Demographics for Trinity County CA

Trinity County School Districts

Trinity County is served by 4 public school districts with 2,008 students enrolled in 2024. The largest districts on the county map are Klamath-Trinity Joint Unified, Trinity Alps Unified and Mountain Valley Unified. Those three districts account for about 96% 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 Trinity County CA

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

Trinity County Housing & Real Estate

Trinity County has a median home value of $329,000 and a median gross rent of $922. About 73% 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 $355,250 and homes spent about 136 days on the market.

Businesses in Trinity County, CA

Trinity County has 662 business listings across 209 categories. The largest categories in Trinity County business listings are Lake (59, 8.9%), Structure And Geography (29, 4.4%), and Campgrounds & RV Parks (23, 3.5%). The full Trinity County business listings dataset includes names, categories, addresses and contact details where available. Trinity County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Trinity County, CA

Trinity County Business Listings

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

Trinity County Basemaps

Trinity 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.