| | Gilman, WI | Mountain, WI | United States |
| Population | 460 | 972 | 329,725,481 |
| Female Population | 47.8% | 50.0% | 50.5% |
| Male Population | 52.2% | 50.0% | 49.5% |
| Median Age | 41 | 56.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 409 | 823 | 309,327,143 |
| Population - 2000 | 474 | 860 | 285,036,114 |
| Population - 1990 | 412 | 637 | 251,960,433 |
| Pop. 2000 to Now | -17.7% | -1.1% | 15.6% |
| Pop. 1990 to Now | -5.3% | 33.6% | 30.8% |
| space4 | | | |
| Population Density | 196.4 | 13.6 | 93.4 |
| Land Area | 2.3 | 71.6 | 3,531,905.4 |
| Water Area | 0.0 | 1.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Gilman, WI | Mountain, WI | United States |
| Age 0 to 4 | 5.0% | 2.6% | 5.9% |
| Age 5 to 9 | 8.9% | 7.0% | 6.1% |
| Age 10 to 14 | 10.7% | 5.7% | 6.6% |
| Age 15 to 17 | 3.0% | 2.4% | 3.9% |
| Age 18 to 20 | 1.1% | 2.3% | 4.0% |
| Age 21 to 24 | 4.8% | 2.6% | 5.2% |
| Age 25 to 34 | 8.5% | 4.7% | 13.8% |
| Age 35 to 44 | 12.8% | 10.2% | 12.9% |
| Age 45 to 54 | 8.3% | 10.3% | 12.6% |
| Age 55 to 59 | 6.7% | 9.7% | 6.7% |
| Age 60 to 64 | 5.2% | 14.7% | 6.3% |
| Age 65 to 74 | 12.6% | 20.8% | 9.6% |
| Age 75 to 84 | 8.0% | 3.7% | 4.5% |
| Age 85 and over | 4.3% | 3.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Gilman, WI | Mountain, WI | United States |
| White | 97.4% | 97.8% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.2% | 1.1% | 0.6% |
| Hawaiian, Pacific Islander | 1.1% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.4% | 0.0% | 3.2% |
| Hispanic | 0.9% | 1.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Gilman, WI | Mountain, WI | United States |
| Married Population | 49.0% | 51.9% | 49.8% |
| Currently Married | 42.9% | 50.2% | 48.0% |
| Married but Separated | 6.1% | 1.7% | 1.8% |
| Single Population | 51.0% | 48.1% | 50.2% |
| Never Married | 24.5% | 20.6% | 33.8% |
| Divorced | 15.6% | 14.2% | 10.8% |
| Widowed | 11.0% | 13.2% | 5.6% |
| space5 | | | |
| Household Size | 2.69 | 1.97 | 2.60 |
| Households | 163 | 493 | 124,010,992 |
| Family Households | 96 | 288 | 80,755,759 |
| Married couple, w/children | 28.1% | 11.8% | 30.5% |
| Married couple, no children | 41.7% | 66.0% | 42.9% |
| Non Family Households | 67 | 205 | 43,255,233 |
| Single householder, w/children | 19.8% | 13.9% | 15.8% |
| Single householder, no children | 10.4% | 8.3% | 10.8% |