County · code 30039
Granite CountyMontana
Granite County is a county in Montana with its seat in Philipsburg, formed on March 2, 1893.
- Founded1893
- County seatPhilipsburg
- Named forgranite
- Land area1,727 sq mi + 5.6 sq mi water
- Population3,309 2020 Census
- Parcels mapped7,696 checked 14 October 2026
Where it is
Granite 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 1893 from Deer Lodge County, Missoula County and Silver Bow. County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Granite County was created from Deer Lodge, Missoula, and Silver Bow counties. The county was named after granite. In 1943, Granite exchanged territory with Missoula County.
- 1893Granite County created Granite created from Deer Lodge, Missoula, and Silver Bow. · Mont. Laws 1893, 3d leg., pp. 212-217
- 1943Exchanged territory Granite exchanged with Missoula. · Mont. Laws 1943, 28th leg., ch. 223/pp. 453-455
Land and parcels
What the maps cover in Granite
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 7,696 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, 3,824 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
Granite 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
Granite 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 Granite County.
See your own lot on these maps
Open Granite 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 Granite County
- When was Granite County founded?
- Granite County was founded in 1893, formed from Deer Lodge County, Missoula County and Silver Bow. County, and named after granite.
- What is the county seat of Granite County?
- The county seat of Granite County is Philipsburg.
- Is there an online parcel map for Granite County?
- Yes. A public source publishes a parcel map of 7,696 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Granite County's boundary or name changed?
- Granite County was created in 1893 from Deer Lodge County, Missoula County and Silver Bow. County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Missoula County.
- Is my lot in a flood zone?
- We do not have flood maps for Granite County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby