| | Red Level, AL | Greenville, AL | United States |
| Population | 462 | 7,395 | 329,725,481 |
| Female Population | 52.4% | 54.9% | 50.5% |
| Male Population | 47.6% | 45.1% | 49.5% |
| Median Age | 37.7 | 35.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 487 | 8,076 | 309,327,143 |
| Population - 2000 | 556 | 7,228 | 285,036,114 |
| Population - 1990 | 588 | 7,492 | 251,960,433 |
| Pop. 2000 to Now | -14.8% | 1.7% | 15.6% |
| Pop. 1990 to Now | -19.4% | -1.9% | 30.8% |
| space4 | | | |
| Population Density | 240.4 | 346.3 | 93.4 |
| Land Area | 1.9 | 21.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Red Level, AL | Greenville, AL | United States |
| Age 0 to 4 | 7.4% | 8.7% | 5.9% |
| Age 5 to 9 | 8.2% | 7.8% | 6.1% |
| Age 10 to 14 | 1.5% | 7.7% | 6.6% |
| Age 15 to 17 | 1.7% | 1.9% | 3.9% |
| Age 18 to 20 | 8.9% | 4.3% | 4.0% |
| Age 21 to 24 | 8.7% | 3.2% | 5.2% |
| Age 25 to 34 | 11.0% | 14.5% | 13.8% |
| Age 35 to 44 | 12.6% | 11.3% | 12.9% |
| Age 45 to 54 | 19.7% | 10.3% | 12.6% |
| Age 55 to 59 | 6.3% | 5.6% | 6.7% |
| Age 60 to 64 | 2.8% | 7.5% | 6.3% |
| Age 65 to 74 | 5.4% | 10.4% | 9.6% |
| Age 75 to 84 | 4.1% | 4.1% | 4.5% |
| Age 85 and over | 1.7% | 2.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Red Level, AL | Greenville, AL | United States |
| White | 74.5% | 34.1% | 59.4% |
| Black | 9.5% | 61.0% | 12.2% |
| Asian | 0.0% | 3.4% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 16.0% | 0.4% | 3.2% |
| Hispanic | 0.0% | 1.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Red Level, AL | Greenville, AL | United States |
| Married Population | 46.7% | 37.8% | 49.8% |
| Currently Married | 46.7% | 36.2% | 48.0% |
| Married but Separated | 0.0% | 1.6% | 1.8% |
| Single Population | 53.3% | 62.2% | 50.2% |
| Never Married | 30.8% | 39.6% | 33.8% |
| Divorced | 14.6% | 14.7% | 10.8% |
| Widowed | 7.8% | 7.9% | 5.6% |
| space5 | | | |
| Household Size | 2.89 | 3.09 | 2.60 |
| Households | 160 | 2,327 | 124,010,992 |
| Family Households | 103 | 1,506 | 80,755,759 |
| Married couple, w/children | 31.1% | 19.7% | 30.5% |
| Married couple, no children | 48.5% | 41.5% | 42.9% |
| Non Family Households | 57 | 821 | 43,255,233 |
| Single householder, w/children | 7.8% | 24.6% | 15.8% |
| Single householder, no children | 12.6% | 14.2% | 10.8% |