| | Monteagle, TN | Mercer, MO | United States |
| Population | 2,174 | 349 | 329,725,481 |
| Female Population | 52.4% | 42.4% | 50.5% |
| Male Population | 47.7% | 57.6% | 49.5% |
| Median Age | 41.6 | 56.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,258 | 314 | 309,327,143 |
| Population - 2000 | 1,238 | 342 | 285,036,114 |
| Population - 1990 | 1,138 | 297 | 251,960,433 |
| Pop. 2000 to Now | 0.0% | -13.5% | 15.6% |
| Pop. 1990 to Now | 8.8% | -0.3% | 30.8% |
| space4 | | | |
| Population Density | 231.2 | 948.4 | 93.4 |
| Land Area | 9.4 | 0.4 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Monteagle, TN | Mercer, MO | United States |
| Age 0 to 4 | 3.9% | 4.3% | 5.9% |
| Age 5 to 9 | 9.0% | 5.2% | 6.1% |
| Age 10 to 14 | 7.4% | 5.2% | 6.6% |
| Age 15 to 17 | 4.7% | 0.0% | 3.9% |
| Age 18 to 20 | 1.3% | 2.0% | 4.0% |
| Age 21 to 24 | 6.5% | 1.7% | 5.2% |
| Age 25 to 34 | 6.3% | 10.0% | 13.8% |
| Age 35 to 44 | 17.0% | 2.6% | 12.9% |
| Age 45 to 54 | 9.0% | 17.8% | 12.6% |
| Age 55 to 59 | 4.3% | 15.8% | 6.7% |
| Age 60 to 64 | 5.2% | 7.2% | 6.3% |
| Age 65 to 74 | 14.3% | 14.9% | 9.6% |
| Age 75 to 84 | 7.6% | 9.2% | 4.5% |
| Age 85 and over | 3.6% | 4.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Monteagle, TN | Mercer, MO | United States |
| White | 89.4% | 91.1% | 59.4% |
| Black | 1.6% | 0.0% | 12.2% |
| Asian | 3.3% | 4.0% | 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 | 1.7% | 0.0% | 3.2% |
| Hispanic | 4.0% | 4.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Monteagle, TN | Mercer, MO | United States |
| Married Population | 46.5% | 43.6% | 49.8% |
| Currently Married | 43.3% | 40.9% | 48.0% |
| Married but Separated | 3.2% | 2.7% | 1.8% |
| Single Population | 53.5% | 56.4% | 50.2% |
| Never Married | 30.7% | 17.5% | 33.8% |
| Divorced | 16.0% | 20.8% | 10.8% |
| Widowed | 6.8% | 18.1% | 5.6% |
| space5 | | | |
| Household Size | 2.64 | 2.09 | 2.60 |
| Households | 768 | 167 | 124,010,992 |
| Family Households | 549 | 89 | 80,755,759 |
| Married couple, w/children | 19.5% | 10.1% | 30.5% |
| Married couple, no children | 45.5% | 65.2% | 42.9% |
| Non Family Households | 219 | 78 | 43,255,233 |
| Single householder, w/children | 26.2% | 14.6% | 15.8% |
| Single householder, no children | 8.7% | 10.1% | 10.8% |