County · code 30091
Sheridan CountyMontana
Sheridan County is a county in Montana, named after Philip Sheridan, with its seat in Plentywood. It was created in 1913 from Valley County.
- Founded1913
- County seatPlentywood
- Named forPhilip Sheridan
- Land area1,677 sq mi + 29 sq mi water
- Population3,539 2020 Census
- Parcels mapped8,311 checked 14 October 2026
Where it is
Sheridan 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 Valley County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Sheridan County was created by petition and election from Valley County on March 24, 1913. In 1919 and 1920, Sheridan County lost territory to the creation of Roosevelt County and then Daniels County.
- 1913Sheridan County created Sheridan created by petition and election from Valley. · Sheridan County Commissioner's Journal Transcribed, 21 March 1913, pp. 87-88; Burlingame, 17-18
- 1919Lost territory Sheridan lost to creation of Roosevelt. · Mont. Laws 1919, 16th leg., ch. 23/pp. 45-50
- 1920Lost territory Sheridan lost to creation of Daniels. · Mont. Rev. Code 1921, sec. 4314/pp. 1567-1568; Burlingame, 17-20
Land and parcels
What the maps cover in Sheridan
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 8,311 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, 2,742 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
Sheridan 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
Sheridan 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 Sheridan County.
See your own lot on these maps
Open Sheridan 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 Sheridan County
- When was Sheridan County founded?
- Sheridan County was founded in 1913, formed from Valley County, and named after Philip Sheridan.
- What is the county seat of Sheridan County?
- The county seat of Sheridan County is Plentywood.
- Is there an online parcel map for Sheridan County?
- Yes. A public source publishes a parcel map of 8,311 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Sheridan County's boundary or name changed?
- Sheridan County was created in 1913 from Valley County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Daniels County and Roosevelt County.
- Is my lot in a flood zone?
- We do not have flood maps for Sheridan County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby