| | Ridgeway, IA | Spillville, IA | United States |
| Population | 257 | 371 | 329,725,481 |
| Female Population | 49.0% | 52.3% | 50.5% |
| Male Population | 51.0% | 47.7% | 49.5% |
| Median Age | 34.2 | 47.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 307 | 370 | 309,327,143 |
| Population - 2000 | 293 | 386 | 285,036,114 |
| Population - 1990 | 295 | 387 | 251,960,433 |
| Pop. 2000 to Now | -2.7% | -11.7% | 15.6% |
| Pop. 1990 to Now | -3.4% | -11.9% | 30.8% |
| space4 | | | |
| Population Density | 340.9 | 845.1 | 93.4 |
| Land Area | 0.8 | 0.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Ridgeway, IA | Spillville, IA | United States |
| Age 0 to 4 | 4.7% | 6.2% | 5.9% |
| Age 5 to 9 | 4.3% | 3.0% | 6.1% |
| Age 10 to 14 | 1.2% | 6.7% | 6.6% |
| Age 15 to 17 | 5.8% | 2.7% | 3.9% |
| Age 18 to 20 | 5.4% | 5.4% | 4.0% |
| Age 21 to 24 | 12.8% | 3.8% | 5.2% |
| Age 25 to 34 | 16.7% | 11.9% | 13.8% |
| Age 35 to 44 | 11.3% | 5.9% | 12.9% |
| Age 45 to 54 | 13.2% | 12.9% | 12.6% |
| Age 55 to 59 | 4.3% | 2.7% | 6.7% |
| Age 60 to 64 | 10.1% | 7.0% | 6.3% |
| Age 65 to 74 | 7.0% | 12.7% | 9.6% |
| Age 75 to 84 | 1.9% | 15.4% | 4.5% |
| Age 85 and over | 1.2% | 3.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Ridgeway, IA | Spillville, IA | United States |
| White | 96.5% | 95.1% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 1.2% | 0.0% | 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 | 2.3% | 1.3% | 3.2% |
| Hispanic | 0.0% | 3.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Ridgeway, IA | Spillville, IA | United States |
| Married Population | 45.0% | 57.7% | 49.8% |
| Currently Married | 45.0% | 57.4% | 48.0% |
| Married but Separated | 0.0% | 0.3% | 1.8% |
| Single Population | 55.0% | 42.3% | 50.2% |
| Never Married | 40.3% | 23.7% | 33.8% |
| Divorced | 12.6% | 9.9% | 10.8% |
| Widowed | 2.2% | 8.7% | 5.6% |
| space5 | | | |
| Household Size | 1.93 | 1.85 | 2.60 |
| Households | 133 | 201 | 124,010,992 |
| Family Households | 66 | 96 | 80,755,759 |
| Married couple, w/children | 27.3% | 27.1% | 30.5% |
| Married couple, no children | 50.0% | 49.0% | 42.9% |
| Non Family Households | 67 | 105 | 43,255,233 |
| Single householder, w/children | 7.6% | 17.7% | 15.8% |
| Single householder, no children | 15.2% | 6.3% | 10.8% |