Roundup is a city located in Musselshell County, Montana. Roundup has a 2025 population of 2,084 . It is also the county seat of Musselshell County . Roundup is currently growing at a rate of 3.32% annually and its population has increased by 19.22% since the most recent census, which recorded a population of 1,748 in 2020.
The average household income in Roundup is $81,013 with a poverty rate of 14.49%. The median age in Roundup is 45.2 years: 45 years for males, and 46.4 years for females. For every 100 females there are 102.7 males.
Data after 2023 is projected based on recent change
The racial composition of Roundup includes 88.75% White, and smaller percentages for other race, Native American and multiracial populations.
White (88.75%)
Two or more races (5.7%)
Other race (2.9%)
Native American (2.65%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 1,743 | 88.75% |
| Two or more races | 112 | 5.7% |
| Other race | 57 | 2.9% |
| Native American | 52 | 2.65% |
Married
Widowed
Divorced
Separated
Never Married
Roundup's average per capita income is $37,955. Household income levels show a median of $57,632. The poverty rate stands at 14.49%.
Name | Median | Mean |
|---|---|---|
| Married Families | $71,786 | - |
| Families | $68,000 | $79,034 |
| Households | $57,632 | $81,013 |
| Non Families | $24,052 | $72,061 |
Average Income
Median Household Income
Poverty Rate