| | Springfield, NJ | Springfield township, NJ | United States |
| Population | 3,248 | 17,004 | 329,725,481 |
| Female Population | 48.4% | 50.9% | 50.5% |
| Male Population | 51.6% | 49.1% | 49.5% |
| Median Age | 45.6 | 43.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,400 | 15,824 | 309,327,143 |
| Population - 2000 | 3,227 | 14,429 | 285,036,114 |
| Population - 1990 | 3,028 | 13,420 | 251,960,433 |
| Pop. 2000 to Now | 0.7% | 20.4% | 15.6% |
| Pop. 1990 to Now | 7.4% | 29.5% | 30.8% |
| space4 | | | |
| Population Density | 108.5 | 3,286.4 | 93.4 |
| Land Area | 29.9 | 5.2 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Springfield, NJ | Springfield township, NJ | United States |
| Age 0 to 4 | 4.0% | 4.1% | 5.9% |
| Age 5 to 9 | 8.7% | 5.9% | 6.1% |
| Age 10 to 14 | 4.6% | 6.4% | 6.6% |
| Age 15 to 17 | 3.2% | 3.8% | 3.9% |
| Age 18 to 20 | 4.3% | 2.0% | 4.0% |
| Age 21 to 24 | 4.1% | 6.3% | 5.2% |
| Age 25 to 34 | 7.7% | 8.2% | 13.8% |
| Age 35 to 44 | 12.5% | 16.2% | 12.9% |
| Age 45 to 54 | 18.0% | 14.8% | 12.6% |
| Age 55 to 59 | 9.8% | 7.5% | 6.7% |
| Age 60 to 64 | 8.5% | 8.0% | 6.3% |
| Age 65 to 74 | 8.6% | 10.4% | 9.6% |
| Age 75 to 84 | 4.4% | 4.3% | 4.5% |
| Age 85 and over | 1.8% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Springfield, NJ | Springfield township, NJ | United States |
| White | 90.7% | 62.8% | 59.4% |
| Black | 1.8% | 8.9% | 12.2% |
| Asian | 1.7% | 9.8% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.7% | 0.4% |
| Two or More Races | 0.6% | 1.0% | 3.2% |
| Hispanic | 5.1% | 16.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Springfield, NJ | Springfield township, NJ | United States |
| Married Population | 55.2% | 61.0% | 49.8% |
| Currently Married | 54.0% | 60.5% | 48.0% |
| Married but Separated | 1.2% | 0.6% | 1.8% |
| Single Population | 44.8% | 39.0% | 50.2% |
| Never Married | 27.3% | 26.5% | 33.8% |
| Divorced | 11.4% | 7.3% | 10.8% |
| Widowed | 6.1% | 5.2% | 5.6% |
| space5 | | | |
| Household Size | 2.68 | 2.60 | 2.60 |
| Households | 1,207 | 6,534 | 124,010,992 |
| Family Households | 906 | 4,842 | 80,755,759 |
| Married couple, w/children | 34.5% | 35.0% | 30.5% |
| Married couple, no children | 45.7% | 49.5% | 42.9% |
| Non Family Households | 301 | 1,692 | 43,255,233 |
| Single householder, w/children | 8.6% | 7.1% | 15.8% |
| Single householder, no children | 11.1% | 8.3% | 10.8% |