| | Leola, SD | Mankato, MN | United States |
| Population | 374 | 43,938 | 329,725,481 |
| Female Population | 36.9% | 50.1% | 50.5% |
| Male Population | 63.1% | 49.9% | 49.5% |
| Median Age | 42.5 | 26.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 457 | 39,932 | 309,327,143 |
| Population - 2000 | 462 | 32,427 | 285,036,114 |
| Population - 1990 | 521 | 31,477 | 251,960,433 |
| Pop. 2000 to Now | -9.1% | 34.0% | 15.6% |
| Pop. 1990 to Now | -19.4% | 38.0% | 30.8% |
| space4 | | | |
| Population Density | 504.0 | 2,302.6 | 93.4 |
| Land Area | 0.7 | 19.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Leola, SD | Mankato, MN | United States |
| Age 0 to 4 | 9.4% | 5.1% | 5.9% |
| Age 5 to 9 | 4.8% | 4.9% | 6.1% |
| Age 10 to 14 | 7.0% | 4.5% | 6.6% |
| Age 15 to 17 | 2.9% | 2.6% | 3.9% |
| Age 18 to 20 | 1.9% | 13.5% | 4.0% |
| Age 21 to 24 | 3.5% | 16.0% | 5.2% |
| Age 25 to 34 | 9.6% | 15.0% | 13.8% |
| Age 35 to 44 | 11.5% | 10.3% | 12.9% |
| Age 45 to 54 | 21.1% | 7.6% | 12.6% |
| Age 55 to 59 | 7.0% | 3.6% | 6.7% |
| Age 60 to 64 | 11.2% | 4.5% | 6.3% |
| Age 65 to 74 | 4.3% | 6.8% | 9.6% |
| Age 75 to 84 | 3.7% | 4.0% | 4.5% |
| Age 85 and over | 2.1% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Leola, SD | Mankato, MN | United States |
| White | 97.6% | 83.5% | 59.4% |
| Black | 0.0% | 6.8% | 12.2% |
| Asian | 0.0% | 3.4% | 5.6% |
| Native American | 1.9% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.5% | 1.7% | 3.2% |
| Hispanic | 0.0% | 4.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Leola, SD | Mankato, MN | United States |
| Married Population | 53.6% | 34.1% | 49.8% |
| Currently Married | 53.6% | 33.4% | 48.0% |
| Married but Separated | 0.0% | 0.7% | 1.8% |
| Single Population | 46.4% | 65.9% | 50.2% |
| Never Married | 29.2% | 54.8% | 33.8% |
| Divorced | 8.5% | 7.6% | 10.8% |
| Widowed | 8.8% | 3.4% | 5.6% |
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| Household Size | 2.86 | 2.35 | 2.60 |
| Households | 118 | 17,196 | 124,010,992 |
| Family Households | 83 | 8,545 | 80,755,759 |
| Married couple, w/children | 36.1% | 28.5% | 30.5% |
| Married couple, no children | 39.8% | 40.7% | 42.9% |
| Non Family Households | 35 | 8,651 | 43,255,233 |
| Single householder, w/children | 4.8% | 18.0% | 15.8% |
| Single householder, no children | 19.3% | 12.8% | 10.8% |