County · code 30095
Stillwater CountyMontana
Stillwater County is a county in Montana with its seat in Columbus. It was formed in 1913.
- Founded1913
- County seatColumbus
- Land area1,797 sq mi + 9.2 sq mi water
- Population8,963 2020 Census
- Parcels mapped10,627 checked 14 October 2026
Where it is
Stillwater 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 1913 from Carbon County, Sweet Grass County and Yellowstone County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Stillwater County was created on March 24, 1913, by petition and election from Carbon, Sweet Grass, and Yellowstone counties. On March 5, 1915, Stillwater exchanged territory with Sweet Grass County.
- 1913Stillwater County created Stillwater created by petition and election from Carbon, Sweet Grass, and Yellowstone. · Mont. Rev. Code 1921, sec. 4350/pp. 1612-1614; Mont. Laws 1915, 14th leg., ch. 74/pp. 100-102; Burlingame, 17-18
- 1915Exchanged territory Stillwater exchanged with Sweet Grass. · Mont. Laws 1915, 14th leg., ch. 74/pp. 100-102
Land and parcels
What the maps cover in Stillwater
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 10,627 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, 6,094 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
Stillwater 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
Stillwater 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 Stillwater County.
See your own lot on these maps
Open Stillwater 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 Stillwater County
- When was Stillwater County founded?
- Stillwater County was founded in 1913, formed from Carbon County, Sweet Grass County and Yellowstone County.
- What is the county seat of Stillwater County?
- The county seat of Stillwater County is Columbus.
- Is there an online parcel map for Stillwater County?
- Yes. A public source publishes a parcel map of 10,627 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Stillwater County's boundary or name changed?
- Stillwater County was created in 1913 from Carbon County, Sweet Grass County and Yellowstone County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Sweet Grass County.
- Is my lot in a flood zone?
- We do not have flood maps for Stillwater County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby