| | McNab, AR | Glenwood, AR | United States |
| Population | 65 | 1,845 | 329,725,481 |
| Female Population | 27.7% | 55.7% | 50.5% |
| Male Population | 72.3% | 44.3% | 49.5% |
| Median Age | 20.8 | 44.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 70 | 2,232 | 309,327,143 |
| Population - 2000 | 37 | 1,751 | 285,036,114 |
| Population - 1990 | 95 | 1,354 | 251,960,433 |
| Pop. 2000 to Now | 70.3% | 20.2% | 15.6% |
| Pop. 1990 to Now | -33.7% | 55.4% | 30.8% |
| space4 | | | |
| Population Density | 189.5 | 209.0 | 93.4 |
| Land Area | 0.3 | 8.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | McNab, AR | Glenwood, AR | United States |
| Age 0 to 4 | 0.0% | 5.6% | 5.9% |
| Age 5 to 9 | 29.2% | 5.4% | 6.1% |
| Age 10 to 14 | 0.0% | 5.6% | 6.6% |
| Age 15 to 17 | 0.0% | 3.8% | 3.9% |
| Age 18 to 20 | 24.6% | 2.0% | 4.0% |
| Age 21 to 24 | 0.0% | 6.9% | 5.2% |
| Age 25 to 34 | 0.0% | 11.1% | 13.8% |
| Age 35 to 44 | 13.8% | 10.2% | 12.9% |
| Age 45 to 54 | 1.5% | 12.6% | 12.6% |
| Age 55 to 59 | 4.6% | 4.2% | 6.7% |
| Age 60 to 64 | 16.9% | 9.2% | 6.3% |
| Age 65 to 74 | 9.2% | 14.0% | 9.6% |
| Age 75 to 84 | 0.0% | 7.6% | 4.5% |
| Age 85 and over | 0.0% | 1.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | McNab, AR | Glenwood, AR | United States |
| White | 7.7% | 73.7% | 59.4% |
| Black | 92.3% | 3.3% | 12.2% |
| Asian | 0.0% | 0.1% | 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 | 0.0% | 0.4% | 3.2% |
| Hispanic | 0.0% | 22.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | McNab, AR | Glenwood, AR | United States |
| Married Population | 47.8% | 48.8% | 49.8% |
| Currently Married | 47.8% | 47.2% | 48.0% |
| Married but Separated | 0.0% | 1.6% | 1.8% |
| Single Population | 52.2% | 51.2% | 50.2% |
| Never Married | 39.1% | 27.4% | 33.8% |
| Divorced | 0.0% | 11.0% | 10.8% |
| Widowed | 13.0% | 12.8% | 5.6% |
| space5 | | | |
| Household Size | 3.10 | 2.27 | 2.60 |
| Households | 21 | 790 | 124,010,992 |
| Family Households | 13 | 461 | 80,755,759 |
| Married couple, w/children | 61.5% | 24.9% | 30.5% |
| Married couple, no children | 38.5% | 46.0% | 42.9% |
| Non Family Households | 8 | 329 | 43,255,233 |
| Single householder, w/children | 0.0% | 22.1% | 15.8% |
| Single householder, no children | 0.0% | 6.9% | 10.8% |