| | Townsend, MT | Sheridan, MT | United States |
| Population | 2,224 | 840 | 329,725,481 |
| Female Population | 49.2% | 57.4% | 50.5% |
| Male Population | 50.8% | 42.6% | 49.5% |
| Median Age | 53.2 | 56 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,901 | 662 | 309,327,143 |
| Population - 2000 | 1,867 | 659 | 285,036,114 |
| Population - 1990 | 1,635 | 652 | 251,960,433 |
| Pop. 2000 to Now | 18.9% | 17.0% | 15.6% |
| Pop. 1990 to Now | 35.8% | 18.3% | 30.8% |
| space4 | | | |
| Population Density | 1,464.1 | 832.5 | 93.4 |
| Land Area | 1.5 | 1.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Townsend, MT | Sheridan, MT | United States |
| Age 0 to 4 | 2.2% | 3.2% | 5.9% |
| Age 5 to 9 | 5.2% | 2.4% | 6.1% |
| Age 10 to 14 | 5.1% | 3.6% | 6.6% |
| Age 15 to 17 | 3.6% | 1.9% | 3.9% |
| Age 18 to 20 | 4.1% | 7.4% | 4.0% |
| Age 21 to 24 | 4.4% | 3.8% | 5.2% |
| Age 25 to 34 | 9.1% | 1.7% | 13.8% |
| Age 35 to 44 | 6.4% | 9.4% | 12.9% |
| Age 45 to 54 | 16.7% | 16.0% | 12.6% |
| Age 55 to 59 | 9.9% | 8.8% | 6.7% |
| Age 60 to 64 | 11.8% | 11.9% | 6.3% |
| Age 65 to 74 | 14.6% | 14.2% | 9.6% |
| Age 75 to 84 | 6.2% | 7.9% | 4.5% |
| Age 85 and over | 0.7% | 8.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Townsend, MT | Sheridan, MT | United States |
| White | 91.8% | 94.3% | 59.4% |
| Black | 0.1% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 1.9% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.7% | 4.3% | 3.2% |
| Hispanic | 5.4% | 1.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Townsend, MT | Sheridan, MT | United States |
| Married Population | 45.5% | 47.1% | 49.8% |
| Currently Married | 45.1% | 44.2% | 48.0% |
| Married but Separated | 0.5% | 2.9% | 1.8% |
| Single Population | 54.5% | 52.9% | 50.2% |
| Never Married | 24.2% | 17.3% | 33.8% |
| Divorced | 23.0% | 20.8% | 10.8% |
| Widowed | 7.3% | 14.8% | 5.6% |
| space5 | | | |
| Household Size | 2.42 | 2.35 | 2.60 |
| Households | 898 | 347 | 124,010,992 |
| Family Households | 528 | 179 | 80,755,759 |
| Married couple, w/children | 24.2% | 15.6% | 30.5% |
| Married couple, no children | 55.9% | 75.4% | 42.9% |
| Non Family Households | 370 | 168 | 43,255,233 |
| Single householder, w/children | 8.5% | 0.0% | 15.8% |
| Single householder, no children | 11.4% | 8.9% | 10.8% |