| | McCausland, IA | Princeville, IL | United States |
| Population | 427 | 1,864 | 329,725,481 |
| Female Population | 49.9% | 51.3% | 50.5% |
| Male Population | 50.1% | 48.7% | 49.5% |
| Median Age | 34.2 | 36.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 303 | 1,740 | 309,327,143 |
| Population - 2000 | 299 | 1,621 | 285,036,114 |
| Population - 1990 | 308 | 1,421 | 251,960,433 |
| Pop. 2000 to Now | 4.0% | 2.6% | 15.6% |
| Pop. 1990 to Now | 1.0% | 17.0% | 30.8% |
| space4 | | | |
| Population Density | 768.0 | 1,105.6 | 93.4 |
| Land Area | 0.6 | 1.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | McCausland, IA | Princeville, IL | United States |
| Age 0 to 4 | 9.4% | 6.5% | 5.9% |
| Age 5 to 9 | 6.6% | 10.4% | 6.1% |
| Age 10 to 14 | 6.3% | 7.8% | 6.6% |
| Age 15 to 17 | 4.9% | 6.0% | 3.9% |
| Age 18 to 20 | 2.1% | 1.4% | 4.0% |
| Age 21 to 24 | 7.5% | 4.2% | 5.2% |
| Age 25 to 34 | 16.2% | 10.7% | 13.8% |
| Age 35 to 44 | 11.9% | 9.9% | 12.9% |
| Age 45 to 54 | 8.4% | 12.3% | 12.6% |
| Age 55 to 59 | 5.9% | 7.3% | 6.7% |
| Age 60 to 64 | 6.1% | 5.7% | 6.3% |
| Age 65 to 74 | 10.1% | 8.5% | 9.6% |
| Age 75 to 84 | 4.2% | 7.5% | 4.5% |
| Age 85 and over | 0.5% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | McCausland, IA | Princeville, IL | United States |
| White | 98.1% | 86.3% | 59.4% |
| Black | 0.0% | 0.3% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 1.4% | 0.4% |
| Two or More Races | 1.4% | 5.2% | 3.2% |
| Hispanic | 0.5% | 6.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | McCausland, IA | Princeville, IL | United States |
| Married Population | 56.0% | 53.3% | 49.8% |
| Currently Married | 52.1% | 50.4% | 48.0% |
| Married but Separated | 3.9% | 2.8% | 1.8% |
| Single Population | 44.0% | 46.7% | 50.2% |
| Never Married | 31.3% | 31.2% | 33.8% |
| Divorced | 9.3% | 8.1% | 10.8% |
| Widowed | 3.3% | 7.4% | 5.6% |
| space5 | | | |
| Household Size | 2.70 | 2.72 | 2.60 |
| Households | 158 | 683 | 124,010,992 |
| Family Households | 118 | 491 | 80,755,759 |
| Married couple, w/children | 23.7% | 26.7% | 30.5% |
| Married couple, no children | 47.5% | 42.6% | 42.9% |
| Non Family Households | 40 | 192 | 43,255,233 |
| Single householder, w/children | 21.2% | 18.9% | 15.8% |
| Single householder, no children | 7.6% | 11.8% | 10.8% |