| | Leoti, KS | Merrimac, MA | United States |
| Population | 1,575 | 6,698 | 329,725,481 |
| Female Population | 49.3% | 48.1% | 50.5% |
| Male Population | 50.7% | 51.9% | 49.5% |
| Median Age | 37.9 | 48.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,529 | 6,369 | 309,327,143 |
| Population - 2000 | 1,598 | 6,138 | 285,036,114 |
| Population - 1990 | 1,738 | 5,166 | 251,960,433 |
| Pop. 2000 to Now | -11.1% | 13.6% | 15.6% |
| Pop. 1990 to Now | -18.3% | 35.0% | 30.8% |
| space4 | | | |
| Population Density | 1,196.8 | 791.9 | 93.4 |
| Land Area | 1.3 | 8.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Leoti, KS | Merrimac, MA | United States |
| Age 0 to 4 | 5.1% | 6.4% | 5.9% |
| Age 5 to 9 | 9.0% | 7.1% | 6.1% |
| Age 10 to 14 | 5.9% | 3.1% | 6.6% |
| Age 15 to 17 | 6.2% | 3.1% | 3.9% |
| Age 18 to 20 | 1.1% | 3.6% | 4.0% |
| Age 21 to 24 | 2.7% | 5.3% | 5.2% |
| Age 25 to 34 | 14.2% | 8.5% | 13.8% |
| Age 35 to 44 | 17.5% | 8.1% | 12.9% |
| Age 45 to 54 | 9.5% | 17.2% | 12.6% |
| Age 55 to 59 | 5.8% | 11.2% | 6.7% |
| Age 60 to 64 | 6.6% | 6.4% | 6.3% |
| Age 65 to 74 | 9.9% | 10.6% | 9.6% |
| Age 75 to 84 | 3.4% | 7.8% | 4.5% |
| Age 85 and over | 2.9% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Leoti, KS | Merrimac, MA | United States |
| White | 65.0% | 92.4% | 59.4% |
| Black | 1.0% | 0.0% | 12.2% |
| Asian | 0.0% | 1.1% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 5.1% | 3.2% |
| Hispanic | 33.6% | 1.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Leoti, KS | Merrimac, MA | United States |
| Married Population | 63.8% | 54.7% | 49.8% |
| Currently Married | 61.6% | 54.3% | 48.0% |
| Married but Separated | 2.2% | 0.4% | 1.8% |
| Single Population | 36.2% | 45.3% | 50.2% |
| Never Married | 27.0% | 28.0% | 33.8% |
| Divorced | 5.0% | 13.8% | 10.8% |
| Widowed | 4.2% | 3.5% | 5.6% |
| space5 | | | |
| Household Size | 2.35 | 2.58 | 2.60 |
| Households | 662 | 2,589 | 124,010,992 |
| Family Households | 414 | 1,758 | 80,755,759 |
| Married couple, w/children | 44.9% | 27.9% | 30.5% |
| Married couple, no children | 40.3% | 52.4% | 42.9% |
| Non Family Households | 248 | 831 | 43,255,233 |
| Single householder, w/children | 9.7% | 12.9% | 15.8% |
| Single householder, no children | 5.1% | 6.8% | 10.8% |