| | Leipsic, OH | Ottawa, OH | United States |
| Population | 2,340 | 4,430 | 329,725,481 |
| Female Population | 45.1% | 53.2% | 50.5% |
| Male Population | 54.9% | 46.8% | 49.5% |
| Median Age | 32.9 | 40.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,097 | 4,455 | 309,327,143 |
| Population - 2000 | 2,236 | 4,367 | 285,036,114 |
| Population - 1990 | 2,203 | 3,999 | 251,960,433 |
| Pop. 2000 to Now | -9.8% | -1.0% | 15.6% |
| Pop. 1990 to Now | -8.5% | 8.1% | 30.8% |
| space4 | | | |
| Population Density | 635.2 | 974.3 | 93.4 |
| Land Area | 3.7 | 4.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Leipsic, OH | Ottawa, OH | United States |
| Age 0 to 4 | 8.2% | 5.4% | 5.9% |
| Age 5 to 9 | 8.7% | 6.7% | 6.1% |
| Age 10 to 14 | 8.9% | 6.0% | 6.6% |
| Age 15 to 17 | 4.0% | 6.2% | 3.9% |
| Age 18 to 20 | 5.0% | 6.1% | 4.0% |
| Age 21 to 24 | 5.4% | 5.7% | 5.2% |
| Age 25 to 34 | 11.1% | 8.5% | 13.8% |
| Age 35 to 44 | 9.4% | 9.3% | 12.9% |
| Age 45 to 54 | 10.4% | 18.5% | 12.6% |
| Age 55 to 59 | 9.1% | 4.4% | 6.7% |
| Age 60 to 64 | 2.4% | 4.4% | 6.3% |
| Age 65 to 74 | 9.0% | 8.5% | 9.6% |
| Age 75 to 84 | 4.9% | 7.0% | 4.5% |
| Age 85 and over | 3.5% | 3.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Leipsic, OH | Ottawa, OH | United States |
| White | 54.1% | 82.2% | 59.4% |
| Black | 1.3% | 0.6% | 12.2% |
| Asian | 0.0% | 0.4% | 5.6% |
| Native American | 0.0% | 0.6% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 1.3% | 0.4% |
| Two or More Races | 3.7% | 1.8% | 3.2% |
| Hispanic | 40.9% | 13.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Leipsic, OH | Ottawa, OH | United States |
| Married Population | 57.3% | 49.8% | 49.8% |
| Currently Married | 56.5% | 49.7% | 48.0% |
| Married but Separated | 0.7% | 0.1% | 1.8% |
| Single Population | 42.7% | 50.2% | 50.2% |
| Never Married | 28.0% | 33.7% | 33.8% |
| Divorced | 9.0% | 7.8% | 10.8% |
| Widowed | 5.8% | 8.6% | 5.6% |
| space5 | | | |
| Household Size | 2.85 | 2.48 | 2.60 |
| Households | 798 | 1,767 | 124,010,992 |
| Family Households | 583 | 1,087 | 80,755,759 |
| Married couple, w/children | 43.4% | 40.4% | 30.5% |
| Married couple, no children | 35.5% | 38.9% | 42.9% |
| Non Family Households | 215 | 680 | 43,255,233 |
| Single householder, w/children | 9.3% | 16.5% | 15.8% |
| Single householder, no children | 11.8% | 4.2% | 10.8% |