| | Elmer, NJ | Corvallis, MT | United States |
| Population | 1,285 | 1,604 | 329,725,481 |
| Female Population | 50.2% | 44.5% | 50.5% |
| Male Population | 49.8% | 55.5% | 49.5% |
| Median Age | 38.4 | 36.5 | 38.4 |
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| Population - 2010 | 1,396 | 616 | 309,327,143 |
| Population - 2000 | 1,384 | 443 | 285,036,114 |
| Population - 1990 | 1,571 | 524 | 251,960,433 |
| Pop. 2000 to Now | -5.2% | 167.0% | 15.6% |
| Pop. 1990 to Now | -16.5% | 125.8% | 30.8% |
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| Population Density | 1,437.4 | 2,779.9 | 93.4 |
| Land Area | 0.9 | 0.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Elmer, NJ | Corvallis, MT | United States |
| Age 0 to 4 | 4.7% | 8.6% | 5.9% |
| Age 5 to 9 | 6.4% | 7.5% | 6.1% |
| Age 10 to 14 | 6.2% | 7.9% | 6.6% |
| Age 15 to 17 | 1.8% | 3.1% | 3.9% |
| Age 18 to 20 | 4.4% | 1.3% | 4.0% |
| Age 21 to 24 | 6.1% | 3.0% | 5.2% |
| Age 25 to 34 | 13.4% | 16.8% | 13.8% |
| Age 35 to 44 | 16.3% | 16.1% | 12.9% |
| Age 45 to 54 | 13.6% | 5.3% | 12.6% |
| Age 55 to 59 | 5.3% | 9.9% | 6.7% |
| Age 60 to 64 | 6.9% | 1.7% | 6.3% |
| Age 65 to 74 | 9.6% | 13.0% | 9.6% |
| Age 75 to 84 | 4.5% | 5.8% | 4.5% |
| Age 85 and over | 0.7% | 0.0% | 1.9% |
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| Race | | | |
| | Elmer, NJ | Corvallis, MT | United States |
| White | 90.6% | 92.4% | 59.4% |
| Black | 3.3% | 0.0% | 12.2% |
| Asian | 4.0% | 0.0% | 5.6% |
| Native American | 0.0% | 1.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.5% | 2.7% | 3.2% |
| Hispanic | 1.5% | 3.5% | 18.4% |
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| Marriage & Family | | | |
| | Elmer, NJ | Corvallis, MT | United States |
| Married Population | 49.0% | 52.4% | 49.8% |
| Currently Married | 45.3% | 52.4% | 48.0% |
| Married but Separated | 3.7% | 0.0% | 1.8% |
| Single Population | 51.0% | 47.6% | 50.2% |
| Never Married | 36.1% | 9.7% | 33.8% |
| Divorced | 10.6% | 29.6% | 10.8% |
| Widowed | 4.2% | 8.3% | 5.6% |
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| Household Size | 2.90 | 2.76 | 2.60 |
| Households | 441 | 581 | 124,010,992 |
| Family Households | 287 | 507 | 80,755,759 |
| Married couple, w/children | 43.9% | 48.3% | 30.5% |
| Married couple, no children | 36.2% | 16.6% | 42.9% |
| Non Family Households | 154 | 74 | 43,255,233 |
| Single householder, w/children | 12.9% | 4.3% | 15.8% |
| Single householder, no children | 7.0% | 30.8% | 10.8% |