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County · code 30083

Richland CountyMontana

Richland County, Montana is a county in northeastern Montana with Sidney as its seat. It was created on May 27, 1914.

  • Founded1914
  • County seatSidney
  • Land area2,085 sq mi + 19 sq mi water
  • Population11,491 2020 Census
  • Parcels mapped11,121 checked 14 October 2026
Open the free map Click any parcel in Richland County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

DawsonRooseveltWibauxMcKenzie, NDWilliams, NDMcCone Sidney Census outline · seat marked

Where it is

Richland 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 CountyRoosevelt CountyRosebud CountySanders CountySheridan CountySilver Bow CountyStillwater CountySweet Grass CountyTeton CountyToole CountyTreasure CountyValley CountyWheatland CountyWibaux CountyYellowstone CountyRichland County Richland
Counties of Montana · Richland highlighted

History

Formed in 1914 from Dawson County

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

Richland County was created by petition and election from Dawson County on May 27, 1914. A boundary dispute with Wibaux County arose in August 1914 and was settled by defining the boundary on February 19, 1915. Richland County lost territory to the creation of McCone County, which took effect on April 1, 1919.

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

  1. 1914
    Richland County created Richland created by petition and election from Dawson.
    from Dawson
    · Minutes of Board of County Commissioners, Dawson County, 25-26 May 1914; Burlingame, 17-19
  2. 1914
    Changed Territory between Richland and Wibaux was placed in dispute when both counties claimed the area.
    Wibaux
    · Minutes of Board of County Commissioners, Dawson County, 15 August 1914; Burlingame, 17-19
  3. 1915
    Changed Boundary between Richland and Wibaux was defined, settling boundary dispute dating from 17 August 1914.
    Wibaux
    · Mont. Laws 1915, 14th leg., ch 24/pp. 32-33
  4. 1919
    Lost territory Richland lost to creation of McCone. Act passed 20 February 1919; took effect 1 April 1919.
    to McCone
    · Mont. Laws 1919, 16th leg., ch. 33/pp. 68-75

Land and parcels

What the maps cover in Richland

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

Richland by the Census

Population
11,491 2020 Census count
Housing units
5,566 2020 Census count
Land area
2,085 square miles
Water area
19 square miles
People per sq mi
6 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

Who to ask before you build, dig or sell

Official county pages only. We link to them; we do not copy them, because they change.

Inside a city or town, permits usually come from that city rather than the county.

Permits

Zoning and code

County government

See your own lot on these maps

Open Richland 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.

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Questions

Common questions about Richland County

When was Richland County founded?
Richland County was founded in 1914, formed from Dawson County.
What is the county seat of Richland County?
The county seat of Richland County is Sidney.
Is there an online parcel map for Richland County?
Yes. A public source publishes a parcel map of 11,121 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Richland County's boundary or name changed?
Richland County was created in 1914 from Dawson County. Since then the Atlas of Historical County Boundaries records 3 later changes, most of them small boundary adjustments, chiefly involving Wibaux County and McCone County.
Who issues building permits in Richland County?
The county's page on building permits: Permits - RICHLAND COUNTY MONTANA. Inside a city or town, ask that city first.
Is my lot in a flood zone?
We do not have flood maps for Richland 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