| | Delmar, MD | Lincoln, ME | United States |
| Population | 3,748 | 4,854 | 329,725,481 |
| Female Population | 52.4% | 50.9% | 50.5% |
| Male Population | 47.6% | 49.1% | 49.5% |
| Median Age | 37.7 | 52.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,099 | 5,086 | 309,327,143 |
| Population - 2000 | 1,859 | 5,221 | 285,036,114 |
| Population - 1990 | 1,430 | 5,587 | 251,960,433 |
| Pop. 2000 to Now | 93.4% | -6.5% | 15.6% |
| Pop. 1990 to Now | 151.5% | -12.6% | 30.8% |
| space4 | | | |
| Population Density | 2,217.8 | 71.6 | 93.4 |
| Land Area | 1.7 | 67.8 | 3,531,905.4 |
| Water Area | 0.0 | 6.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Delmar, MD | Lincoln, ME | United States |
| Age 0 to 4 | 7.4% | 4.3% | 5.9% |
| Age 5 to 9 | 6.4% | 4.5% | 6.1% |
| Age 10 to 14 | 7.5% | 4.5% | 6.6% |
| Age 15 to 17 | 7.0% | 1.5% | 3.9% |
| Age 18 to 20 | 6.5% | 0.1% | 4.0% |
| Age 21 to 24 | 2.5% | 3.7% | 5.2% |
| Age 25 to 34 | 11.2% | 11.7% | 13.8% |
| Age 35 to 44 | 9.7% | 5.9% | 12.9% |
| Age 45 to 54 | 16.5% | 17.4% | 12.6% |
| Age 55 to 59 | 9.3% | 6.6% | 6.7% |
| Age 60 to 64 | 6.0% | 10.0% | 6.3% |
| Age 65 to 74 | 6.4% | 20.9% | 9.6% |
| Age 75 to 84 | 3.8% | 7.6% | 4.5% |
| Age 85 and over | 0.0% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Delmar, MD | Lincoln, ME | United States |
| White | 51.3% | 97.2% | 59.4% |
| Black | 21.2% | 0.0% | 12.2% |
| Asian | 2.7% | 0.0% | 5.6% |
| Native American | 0.3% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.5% | 0.0% | 0.4% |
| Two or More Races | 9.2% | 2.5% | 3.2% |
| Hispanic | 14.9% | 0.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Delmar, MD | Lincoln, ME | United States |
| Married Population | 40.5% | 51.4% | 49.8% |
| Currently Married | 38.6% | 50.4% | 48.0% |
| Married but Separated | 1.9% | 1.1% | 1.8% |
| Single Population | 59.5% | 48.6% | 50.2% |
| Never Married | 39.4% | 15.4% | 33.8% |
| Divorced | 16.4% | 19.3% | 10.8% |
| Widowed | 3.7% | 13.9% | 5.6% |
| space5 | | | |
| Household Size | 2.66 | 2.01 | 2.60 |
| Households | 1,410 | 2,377 | 124,010,992 |
| Family Households | 919 | 1,295 | 80,755,759 |
| Married couple, w/children | 24.5% | 19.9% | 30.5% |
| Married couple, no children | 36.0% | 55.4% | 42.9% |
| Non Family Households | 491 | 1,082 | 43,255,233 |
| Single householder, w/children | 29.9% | 4.8% | 15.8% |
| Single householder, no children | 9.6% | 19.9% | 10.8% |