County · code 30009
Carbon CountyMontana
Carbon County is in Montana and has its county seat in Red Lodge. The county was formed on May 1, 1895, from Park and Yellowstone Counties.
- Founded1895
- County seatRed Lodge
- Named forcarbon
- Land area2,048 sq mi + 14 sq mi water
- Population10,473 2020 Census
- Parcels mapped15,002 checked 14 October 2026
Where it is
Carbon on the map of Montana
Montana has 56 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1895 from Park County and Yellowstone County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Carbon County was created from Park and Yellowstone Counties by an act passed March 4, 1895, taking effect May 1, 1895. In 1913, Carbon County lost territory to the creation of Stillwater County. The county exchanged land with Yellowstone County in 1919 and gained additional territory from Yellowstone County in 1925.
- 1895Carbon County created Carbon created from Park and Yellowstone. Act passed 4 March 1895; took effect 1 May 1895. · Mont. Laws 1895, 4th leg., pp. 49-54
- 1913Lost territory Carbon lost to creation of Stillwater. · Mont. Rev. Code 1921, sec. 4350/pp. 1612-1614; Mont. Laws 1915, 14th leg., ch. 74/pp. 100-102; Burlingame, 17-18
- 1919Exchanged territory Carbon exchanged with Yellowstone. · Mont. Laws 1919, 16th leg., chs. 75, 83/pp. 149-151, 157-158
- 1925Gained territory Carbon gained from Yellowstone. · Mont. Laws 1925, 19th leg., ch. 30/pp. 34-35
Land and parcels
What the maps cover in Carbon
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 15,002 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 14 October 2026 -
Address points Official
One point per address, 8,730 in all from Montana State Library.
edited 13 October 2026 · checked 14 October 2026 -
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Carbon by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Carbon County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Carbon County.
See your own lot on these maps
Open Carbon County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Carbon County
- When was Carbon County founded?
- Carbon County was founded in 1895, formed from Park County and Yellowstone County, and named after carbon.
- What is the county seat of Carbon County?
- The county seat of Carbon County is Red Lodge.
- Is there an online parcel map for Carbon County?
- Yes. A public source publishes a parcel map of 15,002 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Carbon County's boundary or name changed?
- Carbon County was created in 1895 from Park County and Yellowstone County. Since then the Atlas of Historical County Boundaries records 3 later changes, chiefly involving Yellowstone County and Stillwater County.
- Is my lot in a flood zone?
- We do not have flood maps for Carbon County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby