| | Fredericktown, MO | Arcadia, MO | United States |
| Population | 4,274 | 547 | 329,725,481 |
| Female Population | 49.9% | 49.9% | 50.5% |
| Male Population | 50.1% | 50.1% | 49.5% |
| Median Age | 36.6 | 51.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,975 | 586 | 309,327,143 |
| Population - 2000 | 3,928 | 567 | 285,036,114 |
| Population - 1990 | 3,950 | 609 | 251,960,433 |
| Pop. 2000 to Now | 2.0% | -2.7% | 15.6% |
| Pop. 1990 to Now | 1.4% | -9.4% | 30.8% |
| space4 | | | |
| Population Density | 988.4 | 661.4 | 93.4 |
| Land Area | 4.3 | 0.8 | 3,531,905.4 |
| Water Area | 0.2 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Fredericktown, MO | Arcadia, MO | United States |
| Age 0 to 4 | 4.5% | 2.6% | 5.9% |
| Age 5 to 9 | 4.1% | 4.2% | 6.1% |
| Age 10 to 14 | 4.6% | 7.5% | 6.6% |
| Age 15 to 17 | 5.9% | 6.6% | 3.9% |
| Age 18 to 20 | 2.9% | 0.9% | 4.0% |
| Age 21 to 24 | 7.3% | 2.2% | 5.2% |
| Age 25 to 34 | 18.2% | 4.6% | 13.8% |
| Age 35 to 44 | 10.6% | 10.1% | 12.9% |
| Age 45 to 54 | 14.2% | 18.5% | 12.6% |
| Age 55 to 59 | 6.1% | 9.5% | 6.7% |
| Age 60 to 64 | 7.5% | 6.2% | 6.3% |
| Age 65 to 74 | 6.6% | 11.0% | 9.6% |
| Age 75 to 84 | 5.4% | 11.3% | 4.5% |
| Age 85 and over | 2.2% | 4.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Fredericktown, MO | Arcadia, MO | United States |
| White | 90.6% | 96.5% | 59.4% |
| Black | 0.6% | 1.5% | 12.2% |
| Asian | 1.4% | 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 | 1.8% | 2.0% | 3.2% |
| Hispanic | 5.6% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Fredericktown, MO | Arcadia, MO | United States |
| Married Population | 48.9% | 55.0% | 49.8% |
| Currently Married | 44.7% | 52.7% | 48.0% |
| Married but Separated | 4.3% | 2.3% | 1.8% |
| Single Population | 51.1% | 45.0% | 50.2% |
| Never Married | 32.0% | 16.4% | 33.8% |
| Divorced | 13.7% | 21.3% | 10.8% |
| Widowed | 5.4% | 7.2% | 5.6% |
| space5 | | | |
| Household Size | 2.50 | 2.01 | 2.60 |
| Households | 1,651 | 261 | 124,010,992 |
| Family Households | 993 | 135 | 80,755,759 |
| Married couple, w/children | 34.3% | 18.5% | 30.5% |
| Married couple, no children | 41.8% | 68.1% | 42.9% |
| Non Family Households | 658 | 126 | 43,255,233 |
| Single householder, w/children | 14.4% | 13.3% | 15.8% |
| Single householder, no children | 9.5% | 0.0% | 10.8% |