Madison County at a glance
Madison County is one of 56 county-level areas in Montana. Its 3,588.2 square miles of land place it at position 13 among those areas by land size. Including 15.4 square miles of water, its mapped total area is approximately 3,603.6 square miles.
| Full Census name | Madison County |
|---|---|
| State | Montana |
| FIPS / GEOID | 30057 |
| Boundary vintage | 2025 |
| Outline source scale | 1:500,000 |
Counties along the boundary
These county-level areas share a line segment with Madison County in the Census cartographic boundary dataset. Select one to continue exploring.
- Fremont CountyIdaho
- Beaverhead CountyMontana
- Gallatin CountyMontana
- Jefferson CountyMontana
- Silver Bow CountyMontana
Looking for another Madison County?
The short name “Madison” also appears elsewhere. The state and FIPS code distinguish this area.
- Madison County, Florida
- Madison County, Georgia
- Madison County, Idaho
- Madison County, Illinois
- Madison County, Indiana
- Madison County, Iowa
- Madison County, Kentucky
- Madison Parish, Louisiana
- Madison County, Mississippi
- Madison County, Missouri
- Madison County, Nebraska
- Madison County, New York
- Madison County, North Carolina
- Madison County, Ohio
- Madison County, Tennessee
- Madison County, Texas
- Madison County, Virginia
- Madison County, Arkansas
- Madison County, Alabama
Using this map
Choose a blank outline for coloring or a labelled download for reference. SVG preserves editable boundary artwork, PNG works in slides, and PDF provides a ready-to-print landscape page. Use the full state map to compare surrounding counties.
Roads, topography, and aerial imagery are available in the interactive background viewer. Those backgrounds have their own dates and sources; the red boundary overlay follows the 2025 Census geography.
Sources and precision
U.S. Census Bureau, 2025 Cartographic Boundary Files. The county outline uses the 1:500,000 file; location maps and interactive overlays use 1:5,000,000. Areas come from ALAND and AWATER, converted to square miles and rounded to one decimal place. Neighbor links are calculated from shared boundary segments, not from point-only contacts. Generalized maps are for geographic reference, not parcel or legal boundary determination. Full methodology.