| | Oceanside, NY | Glendale, MO | United States |
| Population | 31,182 | 6,143 | 329,725,481 |
| Female Population | 48.9% | 54.1% | 50.5% |
| Male Population | 51.1% | 45.9% | 49.5% |
| Median Age | 45.7 | 39.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 31,078 | 5,929 | 309,327,143 |
| Population - 2000 | 32,733 | 5,767 | 285,036,114 |
| Population - 1990 | 32,423 | 5,945 | 251,960,433 |
| Pop. 2000 to Now | -6.4% | 1.7% | 15.6% |
| Pop. 1990 to Now | -5.5% | -1.4% | 30.8% |
| space4 | | | |
| Population Density | 6,326.2 | 4,773.1 | 93.4 |
| Land Area | 4.9 | 1.3 | 3,531,905.4 |
| Water Area | 0.5 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Oceanside, NY | Glendale, MO | United States |
| Age 0 to 4 | 4.9% | 8.0% | 5.9% |
| Age 5 to 9 | 5.8% | 8.6% | 6.1% |
| Age 10 to 14 | 6.4% | 8.4% | 6.6% |
| Age 15 to 17 | 3.4% | 3.3% | 3.9% |
| Age 18 to 20 | 2.6% | 3.4% | 4.0% |
| Age 21 to 24 | 5.0% | 3.9% | 5.2% |
| Age 25 to 34 | 10.1% | 5.9% | 13.8% |
| Age 35 to 44 | 11.1% | 15.1% | 12.9% |
| Age 45 to 54 | 15.3% | 14.6% | 12.6% |
| Age 55 to 59 | 8.6% | 7.7% | 6.7% |
| Age 60 to 64 | 5.6% | 4.6% | 6.3% |
| Age 65 to 74 | 12.7% | 10.0% | 9.6% |
| Age 75 to 84 | 5.1% | 6.1% | 4.5% |
| Age 85 and over | 3.4% | 0.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Oceanside, NY | Glendale, MO | United States |
| White | 77.9% | 90.2% | 59.4% |
| Black | 1.5% | 1.9% | 12.2% |
| Asian | 3.5% | 3.0% | 5.6% |
| Native American | 0.5% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 1.1% | 3.0% | 3.2% |
| Hispanic | 15.4% | 2.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Oceanside, NY | Glendale, MO | United States |
| Married Population | 61.2% | 68.9% | 49.8% |
| Currently Married | 59.7% | 68.6% | 48.0% |
| Married but Separated | 1.5% | 0.3% | 1.8% |
| Single Population | 38.8% | 31.1% | 50.2% |
| Never Married | 25.9% | 20.3% | 33.8% |
| Divorced | 5.8% | 6.7% | 10.8% |
| Widowed | 7.2% | 4.1% | 5.6% |
| space5 | | | |
| Household Size | 2.88 | 2.63 | 2.60 |
| Households | 10,781 | 2,332 | 124,010,992 |
| Family Households | 8,403 | 1,682 | 80,755,759 |
| Married couple, w/children | 34.9% | 45.2% | 30.5% |
| Married couple, no children | 49.3% | 49.2% | 42.9% |
| Non Family Households | 2,378 | 650 | 43,255,233 |
| Single householder, w/children | 5.9% | 4.3% | 15.8% |
| Single householder, no children | 9.8% | 1.3% | 10.8% |