Madison County GIS Maps

Madison 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.

Madison County Parcels

Madison County has 19,045 mapped parcels covering 2,293,270 acres. The median assessed value is $102,911. The median lot size is 15.52 acres. 10,414 parcels are 10 acres or larger. Vacant land accounts for 38.4% of parcels. Improved property follows at 36.4% and exempt property at 17.0%. The records carry 8,981 distinct owner names. About 27% of parcels list an owner mailing address outside Montana. Owner names, mailing addresses, assessed values and lot sizes are on nearly every parcel. Browse the interactive Madison County Parcel viewer here.

Madison County Parcel Data Coverage

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

Madison County Population

Madison County had 8,623 residents in 2020. That was 12.1% higher than in 2010. Madison County added 1,772 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 2 people per square mile. Some of the county's most populated postal areas include Big Sky, Ennis and Sheridan.

Population Trend in Madison County MT

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

Madison County Zip Codes

Madison County has 12 zip codes. Some of the county's most populated zip codes include Big Sky (59716), Ennis (59729) and Sheridan (59749). Big Sky is the largest zip by population, with about 2,924 residents or 34% of the county total. Together, the three largest zips account for about 84% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Madison County MT

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

Madison County Demographics

Madison County has a median age of 54.1, which makes the county a little older than Montana overall. About 15.7% of residents are under 18, while 30.6% 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 30.6% of the population, which points to an older population profile. About 34.3% of adults have a bachelor's degree or higher, above the statewide figure of 34.5%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.

Key Demographics for Madison County MT

Madison County School Districts

Madison County is served by 3 public school districts with 733 students enrolled in 2024. The largest districts on the county map are Ennis K-12 Schools, Twin Bridges K-12 Schools and Harrison K-12 Schools. Those three districts account for about 100% of public school enrollment in the map area. Total enrollment has grown modestly since 2017 across the districts shown on the county map.

Largest School Districts by Enrollment in Madison County MT

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

Madison County Housing & Real Estate

Madison County has a median home value of $440,500 and a median gross rent of $1,159. About 81% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Montana median, while rents come in above the state average. In March 2026, the median listing price was $1,112,500 and homes spent about 85 days on the market.

Businesses in Madison County, MT

Madison County has 859 business listings across 247 categories. The largest categories in Madison County business listings are Lake (64, 7.5%), Mountain (37, 4.3%), and Structure And Geography (28, 3.3%). The full Madison County business listings dataset includes names, categories, addresses and contact details where available. Madison County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Madison County, MT

Madison County Business Listings

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

Madison County Basemaps

Madison 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 Montana — explore the full structure before you buy.