Blaine County GIS Maps

Blaine 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.

Blaine County Parcels

Blaine County has 12,886 mapped parcels covering 2,707,649 acres. The median assessed value is $17,647. The median lot size is 158.84 acres. 10,339 parcels are 10 acres or larger. Vacant land accounts for 56.1% of parcels. Exempt property follows at 18.4% and improved property at 16.2%. The records carry 2,282 distinct owner names. About 6% 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 Blaine County Parcel viewer here.

Blaine County Parcel Data Coverage

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

Blaine County Population

Blaine County had 7,044 residents in 2020. That was 8.5% higher than in 2010. Blaine County added 35 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 Harlem, Chinook and Hays.

Population Trend in Blaine County MT

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

Blaine County Zip Codes

Blaine County has 7 zip codes. Some of the county's most populated zip codes include Harlem (59526), Chinook (59523) and Hays (59527). Harlem is the largest zip by population, with about 2,649 residents or 38% 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 Blaine County MT

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

Blaine County Demographics

Blaine County has a median age of 33.9, which makes the county a little younger than Montana overall. About 29.4% of residents are under 18, while 16.4% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is Under 18 at about 29.4% of the population, which suggests the county has a notable share of children and family households. About 25.8% of adults have a bachelor's degree or higher, above the statewide figure of 34.5%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.

Key Demographics for Blaine County MT

Blaine County School Districts

Blaine County is served by 1 public school district with 255 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 grown modestly since 2017 across the districts shown on the county map.

Largest School Districts by Enrollment in Blaine County MT

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

Blaine County Housing & Real Estate

Blaine County has a median home value of $124,900 and a median gross rent of $689. About 63% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Montana median, while rents come in below the state average. In March 2026, the median listing price was $85,000 and homes spent about 26 days on the market.

Businesses in Blaine County, MT

Blaine County has 271 business listings across 132 categories. The largest categories in Blaine County business listings are Structure And Geography (12, 4.4%), Churches & Religious Organizations (11, 4.1%), and Public And Government Association (8, 3.0%). The full Blaine County business listings dataset includes names, categories, addresses and contact details where available. Blaine County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Blaine County, MT

Blaine County Business Listings

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

Blaine County Basemaps

Blaine 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.