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County · code 30097

Sweet Grass CountyMontana

Sweet Grass County, Montana, is located in south-central Montana with its county seat in Big Timber. The county was formed on March 5, 1895, from parts of Meagher, Park, and Yellowstone counties.

  • Founded1895
  • County seatBig Timber
  • Named forHierochloe odorata
  • Land area1,856 sq mi + 6.7 sq mi water
  • Population3,678 2020 Census
  • Parcels mapped5,474 checked 16 October 2026
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Updated

StillwaterWheatlandParkGolden ValleyMeagher Big Timber Census outline · seat marked

Where it is

Sweet Grass on the map of Montana

Montana has 56 counties and county equivalents, each with its own records office. Shapes with a page are links.

Beaverhead CountyBig Horn CountyBlaine CountyBroadwater CountyCarbon CountyCarter CountyCascade CountyChouteau CountyCuster CountyDaniels CountyDawson CountyDeer Lodge CountyFallon CountyFergus CountyFlathead CountyGallatin CountyGarfield CountyGlacier CountyGolden Valley CountyGranite CountyHill CountyJefferson CountyJudith Basin CountyLake CountyLewis and Clark CountyLiberty CountyLincoln CountyMcCone CountyMadison CountyMeagher CountyMineral CountyMissoula CountyMusselshell CountyPark CountyPetroleum CountyPhillips CountyPondera CountyPowder River CountyPowell CountyPrairie CountyRavalli CountyRichland CountyRoosevelt CountyRosebud CountySanders CountySheridan CountySilver Bow CountyStillwater CountyTeton CountyToole CountyTreasure CountyValley CountyWheatland CountyWibaux CountyYellowstone CountySweet Grass County Sweet Grass
Counties of Montana · Sweet Grass highlighted

History

Formed in 1895 from Meagher County, Park County and Yellowstone County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Sweet Grass County was created on March 5, 1895, from Meagher, Park, and Yellowstone counties and is named after Hierochloe odorata. The county lost territory to the creation of Stillwater County in 1913, then exchanged territory with Stillwater in 1915. In 1917, Sweet Grass County lost land to the creation of Wheatland County, and in 1920, additional territory was lost to the creation of Golden Valley County.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1895
    Sweet Grass County created Sweet Grass created from Meagher, Park, and Yellowstone.
    from Meagherfrom Parkfrom Yellowstone
    · Mont. Laws 1895, 4th leg., pp. 54-58
  2. 1913
    Lost territory Sweet Grass lost to creation of Stillwater.
    to Stillwater
    · Mont. Rev. Code 1921, sec. 4350/pp. 1612-1614; Mont. Laws 1915, 14th leg., ch. 74/pp. 100-102; Burlingame, 17-18
  3. 1915
    Exchanged territory Sweet Grass exchanged with Stillwater.
    with Stillwater
    · Mont. Laws 1915, 14th leg., ch. 74/pp. 100-102
  4. 1917
    Lost territory Sweet Grass lost to creation of Wheatland. Act passed 22 February 1917; took effect 1 April 1917.
    to Wheatland
    · Mont. Laws 1917, 15th leg., ch. 55/pp. 63-70
  5. 1920
    Lost territory Sweet Grass lost to creation of Golden Valley.
    to Golden Valley
    · Mont. Rev. Code 1921, sec. 4323/pp. 1581-1582; Burlingame, 17-20

Land and parcels

What the maps cover in Sweet Grass

Who publishes each layer, how good it is, and when we last checked.

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

Sweet Grass by the Census

Population
3,678 2020 Census count
Housing units
1,949 2020 Census count
Land area
1,856 square miles
Water area
6.7 square miles
People per sq mi
2 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Sweet Grass County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

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Questions

Common questions about Sweet Grass County

When was Sweet Grass County founded?
Sweet Grass County was founded in 1895, formed from Meagher County, Park County and Yellowstone County, and named after Hierochloe odorata.
What is the county seat of Sweet Grass County?
The county seat of Sweet Grass County is Big Timber.
Is there an online parcel map for Sweet Grass County?
Yes. Montana State Library (Montana Cadastral Framework; data from MT Dept of Revenue ORION and five counties) publishes a parcel map of 5,474 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Sweet Grass County's boundary or name changed?
Sweet Grass County was created in 1895 from Meagher County, Park County and Yellowstone County. Since then the Atlas of Historical County Boundaries records 4 later changes, chiefly involving Stillwater County, Golden Valley County and Wheatland County.
Is my lot in a flood zone?
We do not have flood maps for Sweet Grass County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door