County · code 30075
Powder River CountyMontana
Powder River County is in southeastern Montana, with its county seat in Broadus. The county was created on April 1, 1919, from Custer County.
- Founded1919
- County seatBroadus
- Named forPowder River, Oregon
- Land area3,298 sq mi + 0.6 sq mi water
- Population1,694 2020 Census
- Parcels mapped7,235 checked 14 October 2026
Where it is
Powder River 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 1919 from Custer County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Powder River County was established by an act passed on March 7, 1919, that took effect on April 1, 1919, carved out from Custer County. The county is named after the Powder River.
- 1919Powder River County created Powder River created from Custer. Act passed 7 March 1919; took effect 1 April 1919. · Mont. Laws 1919, 16th leg., ch. 141/pp. 277-282
- 1929Boundary clarified Boundary between Powder River and Carter clarified (no change).with Carterno change· Mont. Laws 1929, 21st leg., ch. 45/pp. 75-76
Land and parcels
What the maps cover in Powder River
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 7,235 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, 1,384 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
Powder River 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
Powder River 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 Powder River County.
See your own lot on these maps
Open Powder River 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 Powder River County
- When was Powder River County founded?
- Powder River County was founded in 1919, formed from Custer County, and named after Powder River, Oregon.
- What is the county seat of Powder River County?
- The county seat of Powder River County is Broadus.
- Is there an online parcel map for Powder River County?
- Yes. A public source publishes a parcel map of 7,235 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Powder River County's boundary or name changed?
- Powder River County was created in 1919 from Custer County. Its boundary has been clarified one time since, with no change on the ground.
- Is my lot in a flood zone?
- We do not have flood maps for Powder River County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby