| | Harding, NJ | Montgomery, NJ | United States |
| Population | 3,871 | 23,557 | 329,725,481 |
| Female Population | 51.7% | 50.1% | 50.5% |
| Male Population | 48.3% | 49.9% | 49.5% |
| Median Age | 50.2 | 41.7 | 38.4 |
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| Population - 2010 | 3,808 | 22,292 | 309,327,143 |
| Population - 2000 | 3,180 | 17,481 | 285,036,114 |
| Population - 1990 | 3,640 | 9,612 | 251,960,433 |
| Pop. 2000 to Now | 18.0% | 32.1% | 15.6% |
| Pop. 1990 to Now | 3.1% | 140.3% | 30.8% |
| space4 | | | |
| Population Density | 194.5 | 729.2 | 93.4 |
| Land Area | 19.9 | 32.3 | 3,531,905.4 |
| Water Area | 0.5 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Harding, NJ | Montgomery, NJ | United States |
| Age 0 to 4 | 1.3% | 3.7% | 5.9% |
| Age 5 to 9 | 9.3% | 6.1% | 6.1% |
| Age 10 to 14 | 6.3% | 9.2% | 6.6% |
| Age 15 to 17 | 5.6% | 6.6% | 3.9% |
| Age 18 to 20 | 3.4% | 3.6% | 4.0% |
| Age 21 to 24 | 2.4% | 4.0% | 5.2% |
| Age 25 to 34 | 7.5% | 7.2% | 13.8% |
| Age 35 to 44 | 9.5% | 13.7% | 12.9% |
| Age 45 to 54 | 13.9% | 19.5% | 12.6% |
| Age 55 to 59 | 8.0% | 7.3% | 6.7% |
| Age 60 to 64 | 7.8% | 6.2% | 6.3% |
| Age 65 to 74 | 13.1% | 6.5% | 9.6% |
| Age 75 to 84 | 9.5% | 4.1% | 4.5% |
| Age 85 and over | 2.5% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Harding, NJ | Montgomery, NJ | United States |
| White | 89.5% | 50.1% | 59.4% |
| Black | 2.2% | 3.3% | 12.2% |
| Asian | 4.5% | 38.5% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 1.2% | 2.7% | 3.2% |
| Hispanic | 2.6% | 4.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Harding, NJ | Montgomery, NJ | United States |
| Married Population | 59.6% | 65.4% | 49.8% |
| Currently Married | 57.4% | 64.8% | 48.0% |
| Married but Separated | 2.2% | 0.7% | 1.8% |
| Single Population | 40.4% | 34.6% | 50.2% |
| Never Married | 27.8% | 25.4% | 33.8% |
| Divorced | 8.5% | 4.7% | 10.8% |
| Widowed | 4.2% | 4.5% | 5.6% |
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| Household Size | 2.62 | 2.93 | 2.60 |
| Households | 1,476 | 7,960 | 124,010,992 |
| Family Households | 1,147 | 6,642 | 80,755,759 |
| Married couple, w/children | 29.4% | 48.8% | 30.5% |
| Married couple, no children | 49.2% | 39.3% | 42.9% |
| Non Family Households | 329 | 1,318 | 43,255,233 |
| Single householder, w/children | 11.0% | 7.2% | 15.8% |
| Single householder, no children | 10.5% | 4.7% | 10.8% |