Montana County Map with Cities
Explore county and ZCTA boundaries
Counties: generalized 2025 TIGERweb. ZIP areas: 2020 Census ZCTAs, not USPS delivery ZIP borders. These datasets are different vintages.
Use the load button to fetch the dated Census geometry.
| Geographic feature | GEOID | Land area (km²) |
|---|
Source: U.S. Census Bureau TIGERweb. The service can be unavailable or rate-limited. Do not treat estimates as legal property boundaries.
Explore geography, source year and identifier definitions before using the map.
Explore this historical reference layer and search its county or county-equivalent names and FIPS identifiers. Alphabetical list as contained in the bundled historic dataset. This is not a verified current count. 56 reference entries Source limitations: Geometry from bundled Basemap Montana Map
County and County-Equivalent Reference List
County / equivalent FIPS (dataset) Beaverhead 30001 Big Horn 30003 Blaine 30005 Broadwater 30007 Carbon 30009 Carter 30011 Cascade 30013 Chouteau 30015 Custer 30017 Daniels 30019 Dawson 30021 Deer Lodge 30023 Fallon 30025 Fergus 30027 Flathead 30029 Gallatin 30031 Garfield 30033 Glacier 30035 Golden Valley 30037 Granite 30039 Hill 30041 Jefferson 30043 Judith Basin 30045 Lake 30047 Lewis and Clark 30049 Liberty 30051 Lincoln 30053 Madison 30057 McCone 30055 Meagher 30059 Mineral 30061 Missoula 30063 Musselshell 30065 Park 30067 Petroleum 30069 Phillips 30071 Pondera 30073 Powder River 30075 Powell 30077 Prairie 30079 Ravalli 30081 Richland 30083 Roosevelt 30085 Rosebud 30087 Sanders 30089 Sheridan 30091 Silver Bow 30093 Stillwater 30095 Sweet Grass 30097 Teton 30099 Toole 30101 Treasure 30103 Valley 30105 Wheatland 30107 Wibaux 30109 Yellowstone 30111 UScounties shapefile (EPSG:4269), source vintage not verified. Do not quote its numeric totals as present-day administrative counts. Downloaded SVG files include no legal accuracy warranty.
Understanding the county-equivalent system in Montana
Some city and county boundaries overlap, while unincorporated areas lie outside municipal limits. County maps must state the record year and jurisdiction definition. County-equivalent units are the level used in many Census datasets; state-level terminology and changes over time can affect counts and boundaries.
Examples of Montana county GEOIDs
| Legacy reference name | Five-digit GEOID | County part |
|---|---|---|
| Beaverhead | 30001 |
001 |
| Big Horn | 30003 |
003 |
| Blaine | 30005 |
005 |
| Broadwater | 30007 |
007 |
| Carbon | 30009 |
009 |
| Carter | 30011 |
011 |
The first two FIPS digits identify the state in this dataset (30); the following three digits identify a county or county-equivalent record. Preserve leading zeros when storing these IDs in spreadsheets, CSV or databases.
How to read and verify the county map
- Start with the state outline and use the on-page search to find a county or full FIPS code.
- Check whether the entry represents a county, parish, borough, census area or independent city.
- Use the source-year label when referencing boundaries or computing statistics.
- For modern population, area or county-seat statistics, join this table to a verified dated government source rather than guessing from the map.
County lists versus postal addresses
A ZIP code, county name and postal city serve different purposes. A mailing address can use a neighboring city’s name, and one ZIP can intersect several counties. Use a point-in-polygon lookup against a properly dated jurisdiction layer when an exact address-to-county answer matters.
Official data to cross-check
The U.S. Census Bureau publishes 2025 Gazetteer county tables with area and representative coordinate fields, and TIGER/Line boundaries. The Gazetteer files do not include population; a separately dated Census or ACS table is required for that value.
How to use the Montana county GEOID list
Our bundled Montana reference includes 56 county or county-equivalent names. These are identifiers from a historical/unverified-vintage dataset, not a verified current list of official county populations or boundaries. Use the first two digits to recognize the state FIPS prefix 30.
| County | Five-digit GEOID | County suffix |
|---|---|---|
| Beaverhead | 30001 | 001 |
| Big Horn | 30003 | 003 |
| Blaine | 30005 | 005 |
| Broadwater | 30007 | 007 |
| Carbon | 30009 | 009 |
| Carter | 30011 | 011 |
| Cascade | 30013 | 013 |
| Chouteau | 30015 | 015 |
| Custer | 30017 | 017 |
| Daniels | 30019 | 019 |
| Dawson | 30021 | 021 |
| Deer Lodge | 30023 | 023 |
| Fallon | 30025 | 025 |
| Fergus | 30027 | 027 |
| Flathead | 30029 | 029 |
| Gallatin | 30031 | 031 |
| Garfield | 30033 | 033 |
| Glacier | 30035 | 035 |
| Golden Valley | 30037 | 037 |
| Granite | 30039 | 039 |
| Hill | 30041 | 041 |
| Jefferson | 30043 | 043 |
For publication-grade administrative statistics, join county GEOIDs to a specified release of the US Census geography/ACS tables. County-seat, income and population columns must be separately sourced and labeled by year. A postal ZIP can cross a county line, so county matching from a ZIP alone is not always exact.
Official cross-checks: Census TIGER/Line geographic files · Census ACS data.
10 questions about Montana
Questions based on search intent and competitor topics; not a verified Google People Also Ask feed.
How many counties or county equivalents are listed for Montana?
The bundled reference currently contains 56 entries for Montana. Because the underlying source vintage is not confirmed against the latest Census release, verify the authoritative current count before quoting it.
What is the county FIPS code for Montana?
Montana has state-level FIPS prefix 30. A complete county GEOID combines the two-digit state code and a three-digit county code. For example, Beaverhead has the stored GEOID 30001.
How do I locate a county on the Montana map?
Use the county-name/FIPS table and consult an authoritative labeled map to match a name to its boundary. A point near a border needs a precise coordinate-based check.
Can I download a blank Montana county map?
Check the associated printable-map page. County outlines require actual county geometry; an exterior state outline alone does not provide individual county borders.
Does the list include all current county equivalents in Montana?
The page displays records in the bundled historical reference, not a certified current list. Independent cities and similar county equivalents require careful definition.
Is the Montana county data from the latest Census year?
No current-vintage certification is claimed for this local dataset. Compare names and GEOIDs against a dated TIGER/Line or Census Gazetteer file.
What is the difference between a county and a ZIP Code in Montana?
County boundaries are government/statistical administrative areas; ZIP Codes are postal delivery identifiers and often cross counties. ZIP Code Tabulation Areas are Census approximations.
Can I look up a Montana county by address?
An authoritative geocoding service or Census Geocoder can map an address to an official county. County names alone do not determine the county of every address.
Where do I find county population and land area for Montana?
Use a named Census population-estimate vintage for people and a Gazetteer/TIGER data year for area. Avoid mixing Census years when calculating density or ranks.
Can I use Montana county borders for property or legal decisions?
No. The reference is intended for education and general exploration. Property and administrative boundary decisions require current authoritative local records and licensed surveys where appropriate.
Editorial and data status: This is an unpublished reference draft. The information must be checked before the page can be treated as current geographic data or production-ready research.