| | McGregor, IA | Elkader, IA | United States |
| Population | 747 | 1,270 | 329,725,481 |
| Female Population | 51.1% | 52.1% | 50.5% |
| Male Population | 48.9% | 48.0% | 49.5% |
| Median Age | 51.6 | 43 | 38.4 |
| space3 | | | |
| Population - 2010 | 868 | 1,290 | 309,327,143 |
| Population - 2000 | 871 | 1,465 | 285,036,114 |
| Population - 1990 | 797 | 1,510 | 251,960,433 |
| Pop. 2000 to Now | -5.2% | -18.0% | 15.6% |
| Pop. 1990 to Now | 3.6% | -20.5% | 30.8% |
| space4 | | | |
| Population Density | 573.7 | 922.3 | 93.4 |
| Land Area | 1.3 | 1.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | McGregor, IA | Elkader, IA | United States |
| Age 0 to 4 | 2.5% | 5.0% | 5.9% |
| Age 5 to 9 | 9.4% | 8.2% | 6.1% |
| Age 10 to 14 | 1.9% | 7.6% | 6.6% |
| Age 15 to 17 | 2.3% | 1.7% | 3.9% |
| Age 18 to 20 | 2.5% | 0.7% | 4.0% |
| Age 21 to 24 | 3.1% | 5.0% | 5.2% |
| Age 25 to 34 | 8.4% | 8.4% | 13.8% |
| Age 35 to 44 | 12.3% | 13.9% | 12.9% |
| Age 45 to 54 | 14.2% | 7.2% | 12.6% |
| Age 55 to 59 | 8.4% | 5.3% | 6.7% |
| Age 60 to 64 | 9.4% | 9.0% | 6.3% |
| Age 65 to 74 | 11.5% | 15.6% | 9.6% |
| Age 75 to 84 | 7.4% | 4.6% | 4.5% |
| Age 85 and over | 6.7% | 7.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | McGregor, IA | Elkader, IA | United States |
| White | 99.1% | 93.9% | 59.4% |
| Black | 0.0% | 0.2% | 12.2% |
| Asian | 0.5% | 0.0% | 5.6% |
| Native American | 0.4% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 2.6% | 3.2% |
| Hispanic | 0.0% | 3.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | McGregor, IA | Elkader, IA | United States |
| Married Population | 53.9% | 56.5% | 49.8% |
| Currently Married | 53.4% | 55.6% | 48.0% |
| Married but Separated | 0.5% | 0.9% | 1.8% |
| Single Population | 46.1% | 43.5% | 50.2% |
| Never Married | 16.3% | 15.9% | 33.8% |
| Divorced | 19.7% | 10.6% | 10.8% |
| Widowed | 10.1% | 17.0% | 5.6% |
| space5 | | | |
| Household Size | 2.01 | 2.02 | 2.60 |
| Households | 357 | 607 | 124,010,992 |
| Family Households | 188 | 319 | 80,755,759 |
| Married couple, w/children | 31.4% | 38.2% | 30.5% |
| Married couple, no children | 54.3% | 46.7% | 42.9% |
| Non Family Households | 169 | 288 | 43,255,233 |
| Single householder, w/children | 11.2% | 12.2% | 15.8% |
| Single householder, no children | 3.2% | 2.8% | 10.8% |