| | Dunkirk, IN | Claypool, IN | United States |
| Population | 1,783 | 445 | 329,725,481 |
| Female Population | 58.7% | 52.4% | 50.5% |
| Male Population | 41.3% | 47.6% | 49.5% |
| Median Age | 44.9 | 34.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,358 | 430 | 309,327,143 |
| Population - 2000 | 2,646 | 311 | 285,036,114 |
| Population - 1990 | 2,739 | 411 | 251,960,433 |
| Pop. 2000 to Now | -15.0% | 38.3% | 15.6% |
| Pop. 1990 to Now | -17.9% | 4.6% | 30.8% |
| space4 | | | |
| Population Density | 1,418.5 | 1,823.8 | 93.4 |
| Land Area | 1.3 | 0.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Dunkirk, IN | Claypool, IN | United States |
| Age 0 to 4 | 6.9% | 7.6% | 5.9% |
| Age 5 to 9 | 4.7% | 5.4% | 6.1% |
| Age 10 to 14 | 4.8% | 8.5% | 6.6% |
| Age 15 to 17 | 6.0% | 7.9% | 3.9% |
| Age 18 to 20 | 3.0% | 7.2% | 4.0% |
| Age 21 to 24 | 7.5% | 6.5% | 5.2% |
| Age 25 to 34 | 6.5% | 9.4% | 13.8% |
| Age 35 to 44 | 11.1% | 12.6% | 12.9% |
| Age 45 to 54 | 16.6% | 12.1% | 12.6% |
| Age 55 to 59 | 5.8% | 7.0% | 6.7% |
| Age 60 to 64 | 7.3% | 5.4% | 6.3% |
| Age 65 to 74 | 12.3% | 7.0% | 9.6% |
| Age 75 to 84 | 6.7% | 2.5% | 4.5% |
| Age 85 and over | 0.8% | 0.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Dunkirk, IN | Claypool, IN | United States |
| White | 95.2% | 92.8% | 59.4% |
| Black | 1.2% | 0.9% | 12.2% |
| Asian | 0.0% | 1.3% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.3% | 1.6% | 3.2% |
| Hispanic | 2.3% | 3.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Dunkirk, IN | Claypool, IN | United States |
| Married Population | 45.3% | 45.0% | 49.8% |
| Currently Married | 43.3% | 39.3% | 48.0% |
| Married but Separated | 1.9% | 5.7% | 1.8% |
| Single Population | 54.7% | 55.0% | 50.2% |
| Never Married | 30.8% | 35.0% | 33.8% |
| Divorced | 18.2% | 15.8% | 10.8% |
| Widowed | 5.7% | 4.3% | 5.6% |
| space5 | | | |
| Household Size | 2.29 | 2.56 | 2.60 |
| Households | 780 | 174 | 124,010,992 |
| Family Households | 487 | 126 | 80,755,759 |
| Married couple, w/children | 21.4% | 27.8% | 30.5% |
| Married couple, no children | 42.3% | 29.4% | 42.9% |
| Non Family Households | 293 | 48 | 43,255,233 |
| Single householder, w/children | 27.9% | 26.2% | 15.8% |
| Single householder, no children | 8.4% | 16.7% | 10.8% |