| | Bar Nunn, WY | Dayton, WY | United States |
| Population | 2,897 | 885 | 329,725,481 |
| Female Population | 48.4% | 46.0% | 50.5% |
| Male Population | 51.6% | 54.0% | 49.5% |
| Median Age | 29.3 | 36.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,197 | 759 | 309,327,143 |
| Population - 2000 | 936 | 678 | 285,036,114 |
| Population - 1990 | 1,115 | 565 | 251,960,433 |
| Pop. 2000 to Now | 206.6% | 22.4% | 15.6% |
| Pop. 1990 to Now | 157.4% | 46.9% | 30.8% |
| space4 | | | |
| Population Density | 1,380.2 | 1,654.2 | 93.4 |
| Land Area | 2.1 | 0.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Bar Nunn, WY | Dayton, WY | United States |
| Age 0 to 4 | 7.2% | 5.1% | 5.9% |
| Age 5 to 9 | 15.9% | 3.5% | 6.1% |
| Age 10 to 14 | 8.0% | 15.5% | 6.6% |
| Age 15 to 17 | 3.3% | 6.3% | 3.9% |
| Age 18 to 20 | 2.4% | 4.2% | 4.0% |
| Age 21 to 24 | 3.7% | 0.6% | 5.2% |
| Age 25 to 34 | 19.9% | 13.2% | 13.8% |
| Age 35 to 44 | 14.3% | 10.2% | 12.9% |
| Age 45 to 54 | 8.3% | 10.2% | 12.6% |
| Age 55 to 59 | 4.9% | 5.1% | 6.7% |
| Age 60 to 64 | 3.7% | 4.2% | 6.3% |
| Age 65 to 74 | 5.1% | 16.2% | 9.6% |
| Age 75 to 84 | 3.3% | 5.5% | 4.5% |
| Age 85 and over | 0.0% | 0.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Bar Nunn, WY | Dayton, WY | United States |
| White | 81.6% | 98.0% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.2% | 0.6% | 0.6% |
| Hawaiian, Pacific Islander | 1.0% | 0.0% | 0.2% |
| Other | 1.0% | 0.0% | 0.4% |
| Two or More Races | 5.7% | 0.1% | 3.2% |
| Hispanic | 10.4% | 1.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Bar Nunn, WY | Dayton, WY | United States |
| Married Population | 64.0% | 52.7% | 49.8% |
| Currently Married | 63.2% | 52.7% | 48.0% |
| Married but Separated | 0.9% | 0.0% | 1.8% |
| Single Population | 36.0% | 47.3% | 50.2% |
| Never Married | 22.3% | 35.1% | 33.8% |
| Divorced | 11.5% | 10.1% | 10.8% |
| Widowed | 2.2% | 2.1% | 5.6% |
| space5 | | | |
| Household Size | 3.30 | 3.06 | 2.60 |
| Households | 879 | 289 | 124,010,992 |
| Family Households | 743 | 190 | 80,755,759 |
| Married couple, w/children | 40.5% | 43.7% | 30.5% |
| Married couple, no children | 39.7% | 46.8% | 42.9% |
| Non Family Households | 136 | 99 | 43,255,233 |
| Single householder, w/children | 13.7% | 9.5% | 15.8% |
| Single householder, no children | 6.1% | 0.0% | 10.8% |