| | Leeds, ME | Winthrop, ME | United States |
| Population | 2,427 | 6,103 | 329,725,481 |
| Female Population | 49.2% | 51.6% | 50.5% |
| Male Population | 50.9% | 48.4% | 49.5% |
| Median Age | 37.5 | 41.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,327 | 6,088 | 309,327,143 |
| Population - 2000 | 2,001 | 6,232 | 285,036,114 |
| Population - 1990 | 1,669 | 5,968 | 251,960,433 |
| Pop. 2000 to Now | 15.9% | -3.3% | 15.6% |
| Pop. 1990 to Now | 39.0% | 1.0% | 30.8% |
| space4 | | | |
| Population Density | 60.6 | 195.7 | 93.4 |
| Land Area | 40.1 | 31.2 | 3,531,905.4 |
| Water Area | 3.4 | 6.7 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Leeds, ME | Winthrop, ME | United States |
| Age 0 to 4 | 9.6% | 5.3% | 5.9% |
| Age 5 to 9 | 9.2% | 5.7% | 6.1% |
| Age 10 to 14 | 10.5% | 8.4% | 6.6% |
| Age 15 to 17 | 1.9% | 3.5% | 3.9% |
| Age 18 to 20 | 5.1% | 2.5% | 4.0% |
| Age 21 to 24 | 1.2% | 2.9% | 5.2% |
| Age 25 to 34 | 8.9% | 15.2% | 13.8% |
| Age 35 to 44 | 13.2% | 11.0% | 12.9% |
| Age 45 to 54 | 13.4% | 11.8% | 12.6% |
| Age 55 to 59 | 5.9% | 6.2% | 6.7% |
| Age 60 to 64 | 7.7% | 8.4% | 6.3% |
| Age 65 to 74 | 10.3% | 13.6% | 9.6% |
| Age 75 to 84 | 3.0% | 2.9% | 4.5% |
| Age 85 and over | 0.3% | 2.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Leeds, ME | Winthrop, ME | United States |
| White | 97.4% | 91.0% | 59.4% |
| Black | 0.3% | 4.9% | 12.2% |
| Asian | 0.2% | 0.2% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.7% | 2.7% | 3.2% |
| Hispanic | 1.4% | 1.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Leeds, ME | Winthrop, ME | United States |
| Married Population | 63.1% | 50.9% | 49.8% |
| Currently Married | 62.2% | 49.9% | 48.0% |
| Married but Separated | 0.9% | 0.9% | 1.8% |
| Single Population | 36.9% | 49.1% | 50.2% |
| Never Married | 22.9% | 30.6% | 33.8% |
| Divorced | 9.7% | 13.0% | 10.8% |
| Widowed | 4.4% | 5.5% | 5.6% |
| space5 | | | |
| Household Size | 3.12 | 2.38 | 2.60 |
| Households | 777 | 2,533 | 124,010,992 |
| Family Households | 613 | 1,571 | 80,755,759 |
| Married couple, w/children | 37.4% | 29.7% | 30.5% |
| Married couple, no children | 49.6% | 47.2% | 42.9% |
| Non Family Households | 164 | 962 | 43,255,233 |
| Single householder, w/children | 5.4% | 8.8% | 15.8% |
| Single householder, no children | 7.7% | 14.3% | 10.8% |