Custer County GIS Maps
Custer County, Montana, has 11,867 residents across 11,863 parcels and covers 3,783.3 square miles. The population grew 1.4% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Custer County is 30017.
Miles City is the county's largest population center. Custer County also includes 4 zip codes, 0 public school districts and 13 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 parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
Custer County Trends
- Population
- 11,867▴
- Median Home Value
- $204,200▴
- K-12 Enrollment
- --—
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.
Custer 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.
Custer County Parcels
Custer County has 11,863 mapped parcels covering 2,410,917 acres. The median assessed value is $42,360. The median lot size is 21.13 acres. 6,403 parcels are 10 acres or larger. Improved property accounts for 42.9% of parcels. Vacant land follows at 42.6% and exempt property at 13.3%. The records carry 4,806 distinct owner names. About 11% of parcels list an owner mailing address outside Montana. Owner names, mailing addresses, assessed values and lot sizes are on nearly every parcel. Site addresses reach 52.9%. Browse the interactive Custer County Parcel viewer here.
Custer County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 11,863 | 100% |
| Owner name | 11,859 | 99.9% |
| Owner mailing address | 11,859 | 99.9% |
| Site address | 6,278 | 52.9% |
| Land use code | 0 | 0% |
| Land use description | 11,859 | 99.9% |
| Assessed value | 11,813 | 99.6% |
| Land value | 11,813 | 99.6% |
| Improvement value | 11,813 | 99.6% |
| Acreage | 11,863 | 100% |
| Parcel boundary | 11,863 | 100% |
| Download all Custer County parcels. | ||
Field coverage measured across all Custer County parcel records.
Custer County Population
Custer County had 11,867 residents in 2020. That was 1.4% higher than in 2010. Custer County added 171 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 3 people per square mile. Some of the county's most populated postal areas include Miles City, Plevna and Miles City.
Population Trend in Custer County MT
Custer County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Custer County Zip Codes
Custer County has 4 zip codes. Some of the county's most populated zip codes include Miles City (59301), Plevna (59336) and Miles City (59338). Miles City is the largest zip by population, with about 11,509 residents or 97% of the county total. Together, the three largest zips account for about 100% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Custer County MT
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 59301 | Miles City | 11,509 | ▴ 0.9% |
| 59336 | Plevna | 253 | ▴ 31.8% |
| 59338 | Miles City | 162 | ▴ 14.1% |
| 59345 | Miles City | 89 | ▴ 270.8% |
| Download all zip code data | |||
Custer County Zip Code populations and trends per most recent census data.
Custer County Demographics
Custer County has a median age of 42.6, which makes the county a little older than Montana overall. About 19.9% of residents are under 18, while 20.4% 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 31% of the population, which points to a solid working-age base. About 29.8% 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 Custer County MT
Median Age
42.6
Under 18
19.9%
Age 65+
20.4%
Bachelor's+
29.8%
Custer County School Districts
Custer County is served by a network of public school districts across the map area. Several larger districts account for a substantial share of students across the county map area. A few larger districts account for much of the county-serving student population. Enrollment trends are not available yet for the districts shown on the county map.
Custer County Housing & Real Estate
Custer County has a median home value of $204,200 and a median gross rent of $918. About 68% 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 $343,250 and homes spent about 71 days on the market.
Custer County Housing Mix
Custer County housing mix: owner, renter and vacant units.
Custer County Housing Trends
Custer County median home value and rent trend (last 5 years).
Businesses in Custer County, MT
Custer County has 671 business listings across 277 categories. The largest categories in Custer County business listings are River (24, 3.6%), Medical Offices (17, 2.5%), and ATMs (14, 2.1%). The full Custer County business listings dataset includes names, categories, addresses and contact details where available. Custer County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Custer County, MT
| Category | Businesses | Share |
|---|---|---|
| River | 24 | 3.6% |
| Medical Offices | 17 | 2.5% |
| ATMs | 14 | 2.1% |
| Churches & Religious Organizations | 12 | 1.8% |
| Auto Repair | 10 | 1.5% |
| Beauty Salons | 9 | 1.3% |
| Casinos | 9 | 1.3% |
| Insurance Agencies | 9 | 1.3% |
| Landmark And Historical Building | 9 | 1.3% |
| Convenience Stores | 8 | 1.2% |
Custer County Business Listings
| Business | Category | City |
|---|---|---|
| Stallard and Associates | Accountant | Miles City |
| Golden Needle Signs & Designs | Advertising Agency | Miles City |
| Eastern Montana AG Repair | Agricultural Service | Miles City |
| Valley Farmers Supply | Agriculture | Miles City |
| Miles City Airport | Airport | Miles City |
| Seed of Life Labs | Miles City Dispensary | Alternative Medicine | Miles City |
| June's Bungalow | American Restaurants | Miles City |
| David J. Nelson, CRNA | Anesthesiologist | Miles City |
| Vintage and Rustics in Montana | Antique Store | Miles City |
| Mr. Appliance of the Big Horns | Appliance Repair Service | Miles City |
| Download Custer County business listings | ||
Custer County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Custer County Basemaps
Custer 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 Custer County Data Package
This page shows a preview of what's included in the Custer 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 parcels, 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 Custer County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.