| | Lincoln, MT | Montpelier, ID | United States |
| Population | 1,096 | 2,610 | 329,725,481 |
| Female Population | 48.0% | 50.7% | 50.5% |
| Male Population | 52.0% | 49.3% | 49.5% |
| Median Age | 53.2 | 35.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 881 | 2,588 | 309,327,143 |
| Population - 2000 | 1,100 | 2,785 | 285,036,114 |
| Population - 1990 | 824 | 2,656 | 251,960,433 |
| Pop. 2000 to Now | -28.0% | -9.2% | 15.6% |
| Pop. 1990 to Now | -3.9% | -4.8% | 30.8% |
| space4 | | | |
| Population Density | 62.5 | 1,126.0 | 93.4 |
| Land Area | 17.5 | 2.3 | 3,531,905.4 |
| Water Area | 0.5 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lincoln, MT | Montpelier, ID | United States |
| Age 0 to 4 | 3.9% | 7.1% | 5.9% |
| Age 5 to 9 | 5.6% | 7.4% | 6.1% |
| Age 10 to 14 | 6.3% | 6.2% | 6.6% |
| Age 15 to 17 | 1.8% | 6.4% | 3.9% |
| Age 18 to 20 | 0.2% | 5.5% | 4.0% |
| Age 21 to 24 | 3.7% | 6.0% | 5.2% |
| Age 25 to 34 | 15.1% | 10.3% | 13.8% |
| Age 35 to 44 | 9.5% | 12.1% | 12.9% |
| Age 45 to 54 | 7.9% | 12.5% | 12.6% |
| Age 55 to 59 | 10.2% | 5.9% | 6.7% |
| Age 60 to 64 | 8.0% | 4.5% | 6.3% |
| Age 65 to 74 | 18.2% | 8.6% | 9.6% |
| Age 75 to 84 | 7.8% | 6.4% | 4.5% |
| Age 85 and over | 1.7% | 1.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lincoln, MT | Montpelier, ID | United States |
| White | 88.0% | 92.1% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.3% | 5.6% |
| Native American | 1.6% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 6.1% | 0.7% | 3.2% |
| Hispanic | 4.4% | 6.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lincoln, MT | Montpelier, ID | United States |
| Married Population | 59.6% | 55.6% | 49.8% |
| Currently Married | 58.1% | 54.3% | 48.0% |
| Married but Separated | 1.5% | 1.3% | 1.8% |
| Single Population | 40.4% | 44.4% | 50.2% |
| Never Married | 19.6% | 25.3% | 33.8% |
| Divorced | 14.2% | 12.8% | 10.8% |
| Widowed | 6.6% | 6.3% | 5.6% |
| space5 | | | |
| Household Size | 2.15 | 2.71 | 2.60 |
| Households | 510 | 952 | 124,010,992 |
| Family Households | 297 | 651 | 80,755,759 |
| Married couple, w/children | 29.0% | 30.7% | 30.5% |
| Married couple, no children | 63.0% | 51.5% | 42.9% |
| Non Family Households | 213 | 301 | 43,255,233 |
| Single householder, w/children | 2.4% | 13.5% | 15.8% |
| Single householder, no children | 5.7% | 4.3% | 10.8% |