| | Haddon Heights, NJ | Haddonfield, NJ | United States |
| Population | 7,453 | 12,383 | 329,725,481 |
| Female Population | 49.6% | 50.3% | 50.5% |
| Male Population | 50.4% | 49.8% | 49.5% |
| Median Age | 40.9 | 39.6 | 38.4 |
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| Population - 2010 | 7,478 | 11,599 | 309,327,143 |
| Population - 2000 | 7,547 | 11,659 | 285,036,114 |
| Population - 1990 | 7,860 | 11,628 | 251,960,433 |
| Pop. 2000 to Now | -0.5% | -2.9% | 15.6% |
| Pop. 1990 to Now | -4.5% | -2.6% | 30.8% |
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| Population Density | 4,759.3 | 4,428.8 | 93.4 |
| Land Area | 1.6 | 2.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Haddon Heights, NJ | Haddonfield, NJ | United States |
| Age 0 to 4 | 5.9% | 7.9% | 5.9% |
| Age 5 to 9 | 6.7% | 8.5% | 6.1% |
| Age 10 to 14 | 5.6% | 9.6% | 6.6% |
| Age 15 to 17 | 3.1% | 6.0% | 3.9% |
| Age 18 to 20 | 2.2% | 2.0% | 4.0% |
| Age 21 to 24 | 4.4% | 2.2% | 5.2% |
| Age 25 to 34 | 15.4% | 7.2% | 13.8% |
| Age 35 to 44 | 10.8% | 16.5% | 12.9% |
| Age 45 to 54 | 11.3% | 16.4% | 12.6% |
| Age 55 to 59 | 6.5% | 5.3% | 6.7% |
| Age 60 to 64 | 5.5% | 3.9% | 6.3% |
| Age 65 to 74 | 10.9% | 7.5% | 9.6% |
| Age 75 to 84 | 8.1% | 5.1% | 4.5% |
| Age 85 and over | 3.6% | 1.8% | 1.9% |
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| Race | | | |
| | Haddon Heights, NJ | Haddonfield, NJ | United States |
| White | 92.7% | 90.2% | 59.4% |
| Black | 2.0% | 0.6% | 12.2% |
| Asian | 1.4% | 1.3% | 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 | 0.8% | 2.6% | 3.2% |
| Hispanic | 3.1% | 5.3% | 18.4% |
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| Marriage & Family | | | |
| | Haddon Heights, NJ | Haddonfield, NJ | United States |
| Married Population | 55.9% | 66.6% | 49.8% |
| Currently Married | 54.6% | 66.3% | 48.0% |
| Married but Separated | 1.2% | 0.3% | 1.8% |
| Single Population | 44.1% | 33.4% | 50.2% |
| Never Married | 27.8% | 22.4% | 33.8% |
| Divorced | 8.2% | 6.2% | 10.8% |
| Widowed | 8.2% | 4.7% | 5.6% |
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| Household Size | 2.40 | 2.89 | 2.60 |
| Households | 3,101 | 4,274 | 124,010,992 |
| Family Households | 2,013 | 3,329 | 80,755,759 |
| Married couple, w/children | 28.4% | 52.8% | 30.5% |
| Married couple, no children | 53.5% | 36.1% | 42.9% |
| Non Family Households | 1,088 | 945 | 43,255,233 |
| Single householder, w/children | 10.4% | 7.6% | 15.8% |
| Single householder, no children | 7.8% | 3.5% | 10.8% |