| | Darlington, MD | Rising Sun, MD | United States |
| Population | 524 | 2,749 | 329,725,481 |
| Female Population | 38.4% | 54.4% | 50.5% |
| Male Population | 61.6% | 45.6% | 49.5% |
| Median Age | 49.6 | 33 | 38.4 |
| space3 | | | |
| Population - 2010 | 449 | 2,793 | 309,327,143 |
| Population - 2000 | 451 | 1,702 | 285,036,114 |
| Population - 1990 | 462 | 1,263 | 251,960,433 |
| Pop. 2000 to Now | 10.6% | 63.6% | 15.6% |
| Pop. 1990 to Now | 8.0% | 120.4% | 30.8% |
| space4 | | | |
| Population Density | 501.4 | 1,689.6 | 93.4 |
| Land Area | 1.0 | 1.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Darlington, MD | Rising Sun, MD | United States |
| Age 0 to 4 | 1.7% | 4.2% | 5.9% |
| Age 5 to 9 | 3.1% | 10.1% | 6.1% |
| Age 10 to 14 | 2.7% | 10.6% | 6.6% |
| Age 15 to 17 | 0.0% | 6.5% | 3.9% |
| Age 18 to 20 | 4.4% | 6.1% | 4.0% |
| Age 21 to 24 | 6.5% | 3.1% | 5.2% |
| Age 25 to 34 | 9.9% | 15.0% | 13.8% |
| Age 35 to 44 | 18.3% | 14.9% | 12.9% |
| Age 45 to 54 | 17.9% | 11.1% | 12.6% |
| Age 55 to 59 | 9.7% | 2.5% | 6.7% |
| Age 60 to 64 | 5.7% | 4.4% | 6.3% |
| Age 65 to 74 | 8.8% | 5.7% | 9.6% |
| Age 75 to 84 | 4.8% | 3.9% | 4.5% |
| Age 85 and over | 6.5% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Darlington, MD | Rising Sun, MD | United States |
| White | 90.5% | 88.5% | 59.4% |
| Black | 0.0% | 0.3% | 12.2% |
| Asian | 0.0% | 0.2% | 5.6% |
| Native American | 1.1% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.2% | 6.3% | 3.2% |
| Hispanic | 4.2% | 4.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Darlington, MD | Rising Sun, MD | United States |
| Married Population | 56.7% | 47.9% | 49.8% |
| Currently Married | 56.7% | 44.9% | 48.0% |
| Married but Separated | 0.0% | 3.0% | 1.8% |
| Single Population | 43.3% | 52.1% | 50.2% |
| Never Married | 28.7% | 28.5% | 33.8% |
| Divorced | 8.0% | 19.1% | 10.8% |
| Widowed | 6.6% | 4.5% | 5.6% |
| space5 | | | |
| Household Size | 2.46 | 2.70 | 2.60 |
| Households | 213 | 1,020 | 124,010,992 |
| Family Households | 157 | 692 | 80,755,759 |
| Married couple, w/children | 5.1% | 48.3% | 30.5% |
| Married couple, no children | 76.4% | 16.3% | 42.9% |
| Non Family Households | 56 | 328 | 43,255,233 |
| Single householder, w/children | 7.0% | 22.8% | 15.8% |
| Single householder, no children | 11.5% | 12.6% | 10.8% |