Montana · Census place 3064525

Roundup, Montana

Roundup is a city in Musselshell County, Montana with an estimated 2,017 residents on July 1, 2024. It is the 37th largest of 55 incorporated places of 1,000+ people in the state.

Population 2024: 2,017; #37 of 55 in Montana
Change since 2020: +15.4%; +269 people
Land area: 1.3 sq mi
Density: 1,564 / sq mi; State median 2,232

Orange pin: Roundup. Shaded: its county. Dark pin: Helena.

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Tools and pages that start from Roundup

Roundup population, 2020 to 2024

Roundup added 269 residents from July 2020 to July 2024, a change of +15.4%. In the latest year it moved by +33.

July 1 estimates. The April 2020 estimates base was 1,743. The axis starts above zero so yearly changes are visible.

Roundup covers 1.29 square miles of land, for 1,564 people per square mile of land. The median Montana place of 5,000+ has 2,232, so Roundup is less dense than the typical town.

What county Roundup is in

All of Roundup's residents live in Musselshell County, which had 5,452 residents in 2024. Roundup holds 37.0% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Roundup

1 ZIP Code Tabulation Area (ZCTA) overlaps Roundup by at least 10% of the ZCTA's or the city's land: 59072. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Roundup is

The Census internal point of Roundup is at 46.448300, -108.539700. Helena, the capital, is 165.6 miles W in a straight line. The nearest larger place is Billings, MT (121,483 people), 45.6 miles away.

Internal point

Decimal: 46.448300, -108.539700
DMS: 46°26'53.88"N 108°32'22.92"W
UTM: 12N 688959.5E 5146799.9N
Geohash: c86b4peuc
Plus code: 85RHCFX6+84

Daylight in Roundup

At 46.45° N, Roundup gets about 15 h 49 min of daylight around the June solstice and 8 h 35 min around the December solstice, a swing of 7 h 14 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Roundup

The eight nearest incorporated places of 1,000+ in Montana, measured between internal points. The closest is Billings, 45.6 miles away, with 121,483 people.

Questions people ask

What is the population of Roundup, MT?

2,017 on July 1, 2024, in the Census Vintage 2024 estimates. That is up 269 (15.4%) from 1,748 in July 2020.

What county is Roundup in?

Musselshell County. All of its residents live in that county.

What ZIP codes cover Roundup?

1 ZIP Code Tabulation Area overlaps it by at least 10% of either area: 59072.

How far is Roundup from Helena?

165.6 miles (266.5 km) in a straight line, heading W from Roundup.

What is the nearest larger city to Roundup?

Billings, MT, with 121,483 residents, 45.6 miles away between internal points.

Sources and data as of

Data as of: Census Vintage 2024 subcounty estimates (July 1, 2024), 2024 Gazetteer places, 2020 ZCTA to place relationship file.

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