| | Ridgely, MD | Middletown, MD | United States |
| Population | 1,868 | 4,893 | 329,725,481 |
| Female Population | 61.0% | 52.8% | 50.5% |
| Male Population | 39.0% | 47.2% | 49.5% |
| Median Age | 36.9 | 38.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,638 | 4,306 | 309,327,143 |
| Population - 2000 | 1,352 | 2,668 | 285,036,114 |
| Population - 1990 | 1,034 | 1,834 | 251,960,433 |
| Pop. 2000 to Now | 22.4% | 84.0% | 15.6% |
| Pop. 1990 to Now | 60.1% | 167.7% | 30.8% |
| space4 | | | |
| Population Density | 1,002.2 | 2,481.2 | 93.4 |
| Land Area | 1.9 | 2.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Ridgely, MD | Middletown, MD | United States |
| Age 0 to 4 | 8.8% | 5.0% | 5.9% |
| Age 5 to 9 | 6.3% | 9.3% | 6.1% |
| Age 10 to 14 | 4.5% | 9.0% | 6.6% |
| Age 15 to 17 | 8.9% | 5.0% | 3.9% |
| Age 18 to 20 | 0.5% | 4.8% | 4.0% |
| Age 21 to 24 | 5.2% | 4.6% | 5.2% |
| Age 25 to 34 | 11.8% | 6.9% | 13.8% |
| Age 35 to 44 | 20.1% | 12.3% | 12.9% |
| Age 45 to 54 | 11.2% | 16.6% | 12.6% |
| Age 55 to 59 | 7.0% | 4.4% | 6.7% |
| Age 60 to 64 | 3.3% | 7.4% | 6.3% |
| Age 65 to 74 | 6.0% | 8.1% | 9.6% |
| Age 75 to 84 | 5.3% | 4.0% | 4.5% |
| Age 85 and over | 1.0% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Ridgely, MD | Middletown, MD | United States |
| White | 72.3% | 81.7% | 59.4% |
| Black | 8.6% | 0.8% | 12.2% |
| Asian | 0.5% | 9.8% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 2.6% | 0.6% | 0.4% |
| Two or More Races | 5.0% | 5.3% | 3.2% |
| Hispanic | 11.0% | 1.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Ridgely, MD | Middletown, MD | United States |
| Married Population | 38.6% | 62.1% | 49.8% |
| Currently Married | 38.0% | 61.6% | 48.0% |
| Married but Separated | 0.6% | 0.6% | 1.8% |
| Single Population | 61.4% | 37.9% | 50.2% |
| Never Married | 41.7% | 26.8% | 33.8% |
| Divorced | 11.0% | 6.4% | 10.8% |
| Widowed | 8.7% | 4.7% | 5.6% |
| space5 | | | |
| Household Size | 2.64 | 3.03 | 2.60 |
| Households | 708 | 1,615 | 124,010,992 |
| Family Households | 432 | 1,242 | 80,755,759 |
| Married couple, w/children | 40.3% | 50.4% | 30.5% |
| Married couple, no children | 21.3% | 38.4% | 42.9% |
| Non Family Households | 276 | 373 | 43,255,233 |
| Single householder, w/children | 25.0% | 7.9% | 15.8% |
| Single householder, no children | 13.4% | 3.3% | 10.8% |