Adams County GIS Maps

Adams 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.

Adams County Parcels

Adams County has 188,472 mapped parcels covering 733,406 acres. The median assessed value is $455,000. The median lot size is 0.17 acres. 6,028 parcels are 10 acres or larger. Residential accounts for 89.6% of parcels. Commercial follows at 3.6% and exempt at 3.4%. The records carry 147,998 distinct owner names. About 7% of parcels list an owner mailing address outside Colorado. Owner names, mailing addresses, assessed values and lot sizes are on nearly every parcel. Site addresses reach 92.8%. Browse the interactive Adams County Parcel viewer here.

Adams County Parcel Data Coverage

Field coverage measured across all Adams County parcel records. Download free sample data here.

Adams County Population

Adams County had 519,572 residents in 2020. That was 17.7% higher than in 2010. Adams County added 155,715 people between 2000 and 2020, which points to steady long-term growth. Thornton is the largest city in the county, but it accounts for only about 27% of the total population. The county is fairly spread out, with about 446 people per square mile. Some of the county's most populated postal areas include Commerce City, Aurora and Denver.

Population Trend in Adams County CO

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

Adams County Zip Codes

Adams County has 20 zip codes. Some of the county's most populated zip codes include Commerce City (80022), Aurora (80011) and Denver (80229). Commerce City is the largest zip by population, with about 57,432 residents or 11% of the county total. Together, the three largest zips account for about 32% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Adams County CO

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

Adams County Demographics

Adams County has a median age of 34.6, which makes the county a little younger than Colorado overall. About 25.4% of residents are under 18, while 11% 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 37.9% of the population, which points to a solid working-age base. About 28% of adults have a bachelor's degree or higher, above the statewide figure of 44.7%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.

Key Demographics for Adams County CO

Adams County School Districts

Adams County is served by 12 public school districts with 130,973 students enrolled in 2024. The largest districts on the county map are Adams-Arapahoe 28J, Adams 12 Five Star Schools and School District 27J. Those three districts account for about 74% 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 Adams County CO

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

Adams County Housing & Real Estate

Adams County has a median home value of $458,400 and a median gross rent of $1,713. About 69% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Colorado median, while rents come in above the state average. In March 2026, the median listing price was $502,495 and homes spent about 37 days on the market.

Businesses in Adams County, CO

Adams County has 17,113 business listings across 1,011 categories. The largest categories in Adams County business listings are Auto Repair (337, 2.0%), Contractors (319, 1.9%), and Real Estate Agents (301, 1.8%). The full Adams County business listings dataset includes names, categories, addresses and contact details where available. Adams County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Adams County, CO

Adams County Business Listings

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

Adams County Basemaps

Adams 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 Colorado — explore the full structure before you buy.