| | Sheldon, MO | Centralia, MO | United States |
| Population | 387 | 4,531 | 329,725,481 |
| Female Population | 47.3% | 52.8% | 50.5% |
| Male Population | 52.7% | 47.2% | 49.5% |
| Median Age | 41.1 | 35.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 542 | 4,037 | 309,327,143 |
| Population - 2000 | 529 | 3,774 | 285,036,114 |
| Population - 1990 | 464 | 3,414 | 251,960,433 |
| Pop. 2000 to Now | -2.7% | 15.1% | 15.6% |
| Pop. 1990 to Now | 11.0% | 27.2% | 30.8% |
| space4 | | | |
| Population Density | 737.1 | 1,583.7 | 93.4 |
| Land Area | 0.5 | 2.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sheldon, MO | Centralia, MO | United States |
| Age 0 to 4 | 9.8% | 7.5% | 5.9% |
| Age 5 to 9 | 9.3% | 7.7% | 6.1% |
| Age 10 to 14 | 6.7% | 2.7% | 6.6% |
| Age 15 to 17 | 1.6% | 4.0% | 3.9% |
| Age 18 to 20 | 5.9% | 2.6% | 4.0% |
| Age 21 to 24 | 1.0% | 2.1% | 5.2% |
| Age 25 to 34 | 11.4% | 21.4% | 13.8% |
| Age 35 to 44 | 9.3% | 7.7% | 12.9% |
| Age 45 to 54 | 8.5% | 7.7% | 12.6% |
| Age 55 to 59 | 11.9% | 5.4% | 6.7% |
| Age 60 to 64 | 8.0% | 9.0% | 6.3% |
| Age 65 to 74 | 12.9% | 13.4% | 9.6% |
| Age 75 to 84 | 2.3% | 7.2% | 4.5% |
| Age 85 and over | 1.3% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sheldon, MO | Centralia, MO | United States |
| White | 97.7% | 96.2% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.5% | 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% | 3.8% | 3.2% |
| Hispanic | 0.0% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sheldon, MO | Centralia, MO | United States |
| Married Population | 47.7% | 59.1% | 49.8% |
| Currently Married | 46.0% | 58.8% | 48.0% |
| Married but Separated | 1.7% | 0.3% | 1.8% |
| Single Population | 52.3% | 40.9% | 50.2% |
| Never Married | 19.2% | 26.8% | 33.8% |
| Divorced | 17.1% | 8.7% | 10.8% |
| Widowed | 16.0% | 5.4% | 5.6% |
| space5 | | | |
| Household Size | 2.51 | 2.30 | 2.60 |
| Households | 154 | 1,945 | 124,010,992 |
| Family Households | 94 | 1,318 | 80,755,759 |
| Married couple, w/children | 25.5% | 32.9% | 30.5% |
| Married couple, no children | 46.8% | 47.0% | 42.9% |
| Non Family Households | 60 | 627 | 43,255,233 |
| Single householder, w/children | 18.1% | 14.3% | 15.8% |
| Single householder, no children | 9.6% | 5.7% | 10.8% |