• county
  • FIPS 30065
  • Largest town: Roundup

Musselshell County, Montana

Musselshell County had 5,452 residents in the Census Vintage 2024 estimate, on 1,869.0 square miles of land. It ranks 35th of 56 in Montana by population and 36th by land area.

Population
5,452
#35 of 56 in Montana · #2,781 in US
Area
1,869.0 sq mi
#36 of 56 in Montana · #309 in US
Density
2.9 / sq mi
#27 of 56 in Montana · #2,913 in US
Median household income
$55,991
#40 of 56 in Montana · #2,235 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Musselshell County within Montana. Pin: Helena.

Measure from here

Tools and pages that start from Musselshell County

Musselshell County population, land area and income

Musselshell County had 5,452 residents in the Census Vintage 2024 estimate, on 1,869.0 square miles of land. It ranks 35th of 56 in Montana by population and 36th by land area. That works out to 2.9 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in Montana has 7,814 residents; Musselshell County is somewhat smaller.

Its SAIPE 2023 median household income of $55,991 is below the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

5,452

3144th1st

2781st of 3,144 (US)

Land area

1,869 sq mi

3144th1st

309th of 3,144 (US)

Density

2.9 / sq mi

3144th1st

2913th of 3,144 (US)

Median household income

$55,991

3143rd1st

2235th of 3,143 (US)

Rank within Montana (56)

Population

5,452

56th1st

35th of 56 (MT)

Land area

1,869 sq mi

56th1st

36th of 56 (MT)

Density

2.9 / sq mi

56th1st

27th of 56 (MT)

Median household income

$55,991

56th1st

40th of 56 (MT)

How Musselshell County's population changed since 2020

Musselshell County gained 703 residents between the July 2020 and July 2024 estimates, a rise of 14.8%. That ranks 2nd of 56 in Montana for growth. The median Montana county changed by +2.8%, and the state as a whole by +4.6%.

Since the April 2020 estimates base, Musselshell County recorded 196 births and 263 deaths, a natural change of -67. Net international migration added -7 and net domestic migration, people moving to or from other US counties, came to +788. The largest single component was domestic migration, which added 788 people.

4,74920204,91020215,18820225,37720235,4522024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
196
Deaths
263
Net international migration
-7
Net domestic migration
+788
Change, July 2023 to July 2024
+75

Where Musselshell County is

The Census internal point of Musselshell County is at 46.505300, -108.439800. It sits in UTM zone 12N. The map shades Montana's 56 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Musselshell County outlined. Dots are towns of 1,000+ people with residents in it.

Liberty County: -1.2%Golden Valley County: +5.1%Dawson County: -2.1%Flathead County: +9.2%Beaverhead County: +6.7%Prairie County: +2.0%Garfield County: +0.9%Lewis and Clark County: +5.5%Sweet Grass County: +2.4%Wheatland County: -0.7%Ravalli County: +8.5%Jefferson County: +9.6%Carter County: -0.6%Chouteau County: -0.6%Custer County: +0.9%Teton County: +3.1%Granite County: +9.0%Deer Lodge County: +4.1%Cascade County: +0.1%Powder River County: +2.4%Meagher County: +7.3%Daniels County: -1.7%Glacier County: -1.8%Wibaux County: -2.7%Fallon County: -2.7%McCone County: -0.7%Sheridan County: -2.5%Missoula County: +3.5%Toole County: +3.7%Sanders County: +11.5%Roosevelt County: -5.6%Rosebud County: -1.3%Treasure County: -2.5%Yellowstone County: +3.9%Blaine County: -1.4%Musselshell County: +14.8%Broadwater County: +21.0%Powell County: +2.6%Fergus County: +3.4%Phillips County: +0.1%Gallatin County: +6.2%Silver Bow County: +2.6%Madison County: +12.6%Richland County: -4.4%Lake County: +6.9%Valley County: -1.7%Judith Basin County: +4.3%Hill County: -1.2%Big Horn County: -2.2%Stillwater County: +5.0%Carbon County: +9.4%Mineral County: +13.7%Petroleum County: +4.6%Pondera County: +3.4%Park County: +4.9%Lincoln County: +12.4%
Change 2020 to 2024
  1. < -1.4%
  2. < +0.9%
  3. < +3.9%
  4. < +7.3%
  5. ≥ +7.3%
no data

Orange pin: Musselshell County internal point. Dark pin: Helena.

Internal point

Decimal
46.505300, -108.439800
DMS
46°30'19.08"N 108°26'23.28"W
UTM
12N 696426.5E 5153376.9N
Geohash
c86bs6h91
Plus code
85RHGH46+43

Towns in Musselshell County

One incorporated place of 1,000+ people has residents in Musselshell County, 2,017 people together, or 37% of the county. Each figure counts only the part of the town inside Musselshell County; towns marked "part" extend into another county. The largest is Roundup with 2,017.

  1. 01Roundup2,017
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Musselshell County

The Census 2024 county adjacency file lists 5 neighbors for Musselshell County. The most populous is Yellowstone County, MT, with 171,583 residents. Distances run between Census internal points in a straight line.

Distance to Helena and the nearest big city

Helena is 170.1 miles W of Musselshell County's internal point in a straight line. The nearest place of 100,000 or more is Billings, MT (population 121,483), 49.8 miles away.

Musselshell County FIPS code

The FIPS code of Musselshell County is 30065: state code 30 for Montana plus county code 065. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $55,991.

Questions people ask

What is the population of Musselshell County, Montana?

The Census Vintage 2024 estimate for July 1, 2024 is 5,452. That is up 703 people (14.8%) from the July 2020 estimate of 4,749.

What is the FIPS code of Musselshell County?

30065. The first two digits (30) are Montana; the last three (065) identify the county.

What is the largest town in Musselshell County?

Roundup, with 2,017 residents inside Musselshell County in 2024.

Which counties border Musselshell County?

5 county-equivalents border it in the Census 2024 adjacency file: Yellowstone County, MT; Fergus County, MT; Rosebud County, MT; Golden Valley County, MT; Petroleum County, MT.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.