| | Richmond, KS | Iola, KS | United States |
| Population | 547 | 5,378 | 329,725,481 |
| Female Population | 57.2% | 51.5% | 50.5% |
| Male Population | 42.8% | 48.6% | 49.5% |
| Median Age | 37.1 | 36 | 38.4 |
| space3 | | | |
| Population - 2010 | 464 | 5,702 | 309,327,143 |
| Population - 2000 | 510 | 6,302 | 285,036,114 |
| Population - 1990 | 528 | 6,351 | 251,960,433 |
| Pop. 2000 to Now | -10.4% | -16.5% | 15.6% |
| Pop. 1990 to Now | -13.5% | -17.1% | 30.8% |
| space4 | | | |
| Population Density | 1,580.9 | 1,202.3 | 93.4 |
| Land Area | 0.3 | 4.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Richmond, KS | Iola, KS | United States |
| Age 0 to 4 | 3.8% | 4.8% | 5.9% |
| Age 5 to 9 | 4.8% | 8.4% | 6.1% |
| Age 10 to 14 | 13.2% | 6.3% | 6.6% |
| Age 15 to 17 | 3.7% | 3.1% | 3.9% |
| Age 18 to 20 | 1.6% | 6.2% | 4.0% |
| Age 21 to 24 | 14.3% | 7.1% | 5.2% |
| Age 25 to 34 | 7.7% | 13.4% | 13.8% |
| Age 35 to 44 | 7.3% | 9.9% | 12.9% |
| Age 45 to 54 | 5.1% | 10.8% | 12.6% |
| Age 55 to 59 | 7.1% | 7.4% | 6.7% |
| Age 60 to 64 | 9.3% | 3.8% | 6.3% |
| Age 65 to 74 | 6.0% | 8.1% | 9.6% |
| Age 75 to 84 | 13.0% | 6.5% | 4.5% |
| Age 85 and over | 3.1% | 4.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Richmond, KS | Iola, KS | United States |
| White | 75.3% | 85.3% | 59.4% |
| Black | 0.0% | 4.5% | 12.2% |
| Asian | 0.2% | 1.0% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.9% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 24.5% | 3.4% | 3.2% |
| Hispanic | 0.0% | 4.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Richmond, KS | Iola, KS | United States |
| Married Population | 40.7% | 45.3% | 49.8% |
| Currently Married | 40.4% | 42.6% | 48.0% |
| Married but Separated | 0.2% | 2.7% | 1.8% |
| Single Population | 59.3% | 54.7% | 50.2% |
| Never Married | 29.4% | 30.1% | 33.8% |
| Divorced | 11.0% | 17.0% | 10.8% |
| Widowed | 18.9% | 7.7% | 5.6% |
| space5 | | | |
| Household Size | 2.85 | 2.35 | 2.60 |
| Households | 177 | 2,156 | 124,010,992 |
| Family Households | 123 | 1,224 | 80,755,759 |
| Married couple, w/children | 20.3% | 19.6% | 30.5% |
| Married couple, no children | 44.7% | 42.6% | 42.9% |
| Non Family Households | 54 | 932 | 43,255,233 |
| Single householder, w/children | 26.8% | 25.0% | 15.8% |
| Single householder, no children | 8.1% | 12.7% | 10.8% |