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Below is information on the population, racial profile, house hold count, and sex/age profiles for the city of Roundup. These results are gathered once every 10 years and may not be 100% accurate or up to date.
The population for Roundup, Montana is approximatly 1931.
Racial profile for Roundup:
| White : | 1874 |
| Black : | 3 |
| Native American : | 15 |
| Asian : | 2 |
| Pacific Islander : | 0 |
| Other : | 9 |
| * results may not accumulate to total population due to mixed race individuals | |
Population by age for males in Roundup, Montana :
| 18 - 19 : | 26 |
| 20 : | 9 |
| 21 : | 9 |
| 22 - 24 : | 18 |
| 25 - 29 : | 46 |
| 30 - 34 : | 49 |
| 35 - 39 : | 47 |
| 40 - 44 : | 88 |
| 45 - 49 : | 89 |
| 50 - 54 : | 67 |
| 55 - 59 : | 39 |
| 60 - 61 : | 4 |
| 62 - 64 : | 16 |
| 65 - 66 : | 11 |
| 67 - 69 : | 30 |
| 70 - 74 : | 38 |
| 75 - 79 : | 27 |
| 80 - 84 : | 25 |
| 85+ : | 30 |
Population by age for females in Roundup, Montana :
| 18 - 19 : | 23 |
| 20 : | 6 |
| 21 : | 8 |
| 22 - 24 : | 20 |
| 25 - 29 : | 46 |
| 30 - 34 : | 38 |
| 35 - 39 : | 71 |
| 40 - 44 : | 85 |
| 45 - 49 : | 84 |
| 50 - 54 : | 61 |
| 55 - 59 : | 32 |
| 60 - 61 : | 18 |
| 62 - 64 : | 27 |
| 65 - 66 : | 19 |
| 67 - 69 : | 29 |
| 70 - 74 : | 51 |
| 75 - 79 : | 54 |
| 80 - 84 : | 44 |
| 85+ : | 64 |
The total amount of households in Roundup, Montana is 833. With 1876 people of the population in these households. The average household size is 2.25.
1475 people in Roundup, Montana are part of a family. The average family size in Roundup is 2.96 people.
There are 335 married families in Roundup, Montana.
Number of married families by number of members in the family :
| 0 - 2 : | 47 | 3 - 4 : | 36 | 5 : | 12 | 6 - 11 : | 106 | 12 - 17 : | 134 |