| | Atwater, OH | Lyndhurst, OH | United States |
| Population | 869 | 13,980 | 329,725,481 |
| Female Population | 51.7% | 54.8% | 50.5% |
| Male Population | 48.3% | 45.3% | 49.5% |
| Median Age | 25.6 | 48.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 616 | 13,950 | 309,327,143 |
| Population - 2000 | 706 | 15,279 | 285,036,114 |
| Population - 1990 | 765 | 15,982 | 251,960,433 |
| Pop. 2000 to Now | 48.7% | -13.3% | 15.6% |
| Pop. 1990 to Now | 37.3% | -17.1% | 30.8% |
| space4 | | | |
| Population Density | 1,032.1 | 3,154.3 | 93.4 |
| Land Area | 0.8 | 4.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Atwater, OH | Lyndhurst, OH | United States |
| Age 0 to 4 | 10.4% | 4.7% | 5.9% |
| Age 5 to 9 | 4.1% | 3.9% | 6.1% |
| Age 10 to 14 | 12.8% | 4.6% | 6.6% |
| Age 15 to 17 | 7.8% | 1.9% | 3.9% |
| Age 18 to 20 | 4.7% | 2.5% | 4.0% |
| Age 21 to 24 | 5.4% | 2.8% | 5.2% |
| Age 25 to 34 | 19.2% | 13.2% | 13.8% |
| Age 35 to 44 | 6.1% | 11.2% | 12.9% |
| Age 45 to 54 | 10.8% | 12.6% | 12.6% |
| Age 55 to 59 | 1.8% | 6.3% | 6.7% |
| Age 60 to 64 | 5.9% | 7.6% | 6.3% |
| Age 65 to 74 | 10.9% | 14.2% | 9.6% |
| Age 75 to 84 | 0.0% | 8.5% | 4.5% |
| Age 85 and over | 0.0% | 5.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Atwater, OH | Lyndhurst, OH | United States |
| White | 98.2% | 79.3% | 59.4% |
| Black | 0.0% | 14.5% | 12.2% |
| Asian | 0.0% | 2.2% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.8% | 1.3% | 3.2% |
| Hispanic | 0.0% | 2.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Atwater, OH | Lyndhurst, OH | United States |
| Married Population | 64.1% | 51.5% | 49.8% |
| Currently Married | 64.1% | 49.2% | 48.0% |
| Married but Separated | 0.0% | 2.3% | 1.8% |
| Single Population | 35.9% | 48.5% | 50.2% |
| Never Married | 29.3% | 28.5% | 33.8% |
| Divorced | 6.6% | 11.3% | 10.8% |
| Widowed | 0.0% | 8.6% | 5.6% |
| space5 | | | |
| Household Size | 3.19 | 2.04 | 2.60 |
| Households | 272 | 6,760 | 124,010,992 |
| Family Households | 194 | 3,841 | 80,755,759 |
| Married couple, w/children | 58.2% | 19.6% | 30.5% |
| Married couple, no children | 39.2% | 55.1% | 42.9% |
| Non Family Households | 78 | 2,919 | 43,255,233 |
| Single householder, w/children | 0.0% | 10.6% | 15.8% |
| Single householder, no children | 2.6% | 14.7% | 10.8% |