| | Medford Lakes, NJ | Leisuretowne, NJ | United States |
| Population | 4,240 | 3,209 | 329,725,481 |
| Female Population | 55.5% | 59.5% | 50.5% |
| Male Population | 44.5% | 40.5% | 49.5% |
| Median Age | 43.4 | 71.8 | 38.4 |
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| Population - 2010 | 4,154 | 3,405 | 309,327,143 |
| Population - 2000 | 4,173 | 2,535 | 285,036,114 |
| Population - 1990 | 4,462 | 2,552 | 251,960,433 |
| Pop. 2000 to Now | -6.3% | 42.5% | 15.6% |
| Pop. 1990 to Now | -12.4% | 41.5% | 30.8% |
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| Population Density | 3,719.3 | 1,669.6 | 93.4 |
| Land Area | 1.1 | 1.9 | 3,531,905.4 |
| Water Area | 0.1 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Medford Lakes, NJ | Leisuretowne, NJ | United States |
| Age 0 to 4 | 5.0% | 0.7% | 5.9% |
| Age 5 to 9 | 8.1% | 0.5% | 6.1% |
| Age 10 to 14 | 6.5% | 1.2% | 6.6% |
| Age 15 to 17 | 5.4% | 0.0% | 3.9% |
| Age 18 to 20 | 4.2% | 0.5% | 4.0% |
| Age 21 to 24 | 3.2% | 0.6% | 5.2% |
| Age 25 to 34 | 9.5% | 1.0% | 13.8% |
| Age 35 to 44 | 10.1% | 3.1% | 12.9% |
| Age 45 to 54 | 16.3% | 1.8% | 12.6% |
| Age 55 to 59 | 5.0% | 2.4% | 6.7% |
| Age 60 to 64 | 5.9% | 19.3% | 6.3% |
| Age 65 to 74 | 11.7% | 32.6% | 9.6% |
| Age 75 to 84 | 7.7% | 26.7% | 4.5% |
| Age 85 and over | 1.4% | 9.6% | 1.9% |
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| Race | | | |
| | Medford Lakes, NJ | Leisuretowne, NJ | United States |
| White | 90.3% | 95.3% | 59.4% |
| Black | 0.0% | 3.7% | 12.2% |
| Asian | 2.1% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.7% | 0.6% | 3.2% |
| Hispanic | 2.9% | 0.5% | 18.4% |
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| Marriage & Family | | | |
| | Medford Lakes, NJ | Leisuretowne, NJ | United States |
| Married Population | 60.8% | 61.2% | 49.8% |
| Currently Married | 59.8% | 60.6% | 48.0% |
| Married but Separated | 1.0% | 0.5% | 1.8% |
| Single Population | 39.2% | 38.8% | 50.2% |
| Never Married | 20.8% | 8.5% | 33.8% |
| Divorced | 11.6% | 12.6% | 10.8% |
| Widowed | 6.7% | 17.8% | 5.6% |
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| Household Size | 2.93 | 1.65 | 2.60 |
| Households | 1,448 | 1,941 | 124,010,992 |
| Family Households | 1,189 | 1,018 | 80,755,759 |
| Married couple, w/children | 41.4% | 0.8% | 30.5% |
| Married couple, no children | 43.2% | 90.7% | 42.9% |
| Non Family Households | 259 | 923 | 43,255,233 |
| Single householder, w/children | 6.1% | 2.9% | 15.8% |
| Single householder, no children | 9.3% | 5.6% | 10.8% |