| | Humboldt, NE | Sulphur, LA | United States |
| Population | 913 | 21,490 | 329,725,481 |
| Female Population | 42.7% | 52.6% | 50.5% |
| Male Population | 57.3% | 47.4% | 49.5% |
| Median Age | 49.7 | 38.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 878 | 20,356 | 309,327,143 |
| Population - 2000 | 941 | 20,512 | 285,036,114 |
| Population - 1990 | 1,003 | 20,125 | 251,960,433 |
| Pop. 2000 to Now | -15.4% | -1.9% | 15.6% |
| Pop. 1990 to Now | -20.6% | 0.0% | 30.8% |
| space4 | | | |
| Population Density | 684.4 | 1,912.6 | 93.4 |
| Land Area | 1.3 | 11.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Humboldt, NE | Sulphur, LA | United States |
| Age 0 to 4 | 2.6% | 6.9% | 5.9% |
| Age 5 to 9 | 5.3% | 8.2% | 6.1% |
| Age 10 to 14 | 4.8% | 6.1% | 6.6% |
| Age 15 to 17 | 1.2% | 3.7% | 3.9% |
| Age 18 to 20 | 5.7% | 2.7% | 4.0% |
| Age 21 to 24 | 2.5% | 4.6% | 5.2% |
| Age 25 to 34 | 13.5% | 13.4% | 13.8% |
| Age 35 to 44 | 8.5% | 12.5% | 12.9% |
| Age 45 to 54 | 11.7% | 11.7% | 12.6% |
| Age 55 to 59 | 8.5% | 5.9% | 6.7% |
| Age 60 to 64 | 11.0% | 5.8% | 6.3% |
| Age 65 to 74 | 11.9% | 11.5% | 9.6% |
| Age 75 to 84 | 9.2% | 5.2% | 4.5% |
| Age 85 and over | 3.5% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Humboldt, NE | Sulphur, LA | United States |
| White | 87.3% | 86.1% | 59.4% |
| Black | 0.0% | 6.3% | 12.2% |
| Asian | 0.0% | 0.5% | 5.6% |
| Native American | 0.0% | 0.6% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.9% | 1.5% | 3.2% |
| Hispanic | 10.8% | 5.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Humboldt, NE | Sulphur, LA | United States |
| Married Population | 39.9% | 43.1% | 49.8% |
| Currently Married | 37.0% | 42.3% | 48.0% |
| Married but Separated | 2.9% | 0.8% | 1.8% |
| Single Population | 60.1% | 56.9% | 50.2% |
| Never Married | 30.4% | 30.6% | 33.8% |
| Divorced | 20.6% | 17.0% | 10.8% |
| Widowed | 9.2% | 9.3% | 5.6% |
| space5 | | | |
| Household Size | 2.23 | 2.55 | 2.60 |
| Households | 396 | 8,380 | 124,010,992 |
| Family Households | 210 | 4,821 | 80,755,759 |
| Married couple, w/children | 13.8% | 30.8% | 30.5% |
| Married couple, no children | 50.0% | 40.6% | 42.9% |
| Non Family Households | 186 | 3,559 | 43,255,233 |
| Single householder, w/children | 24.8% | 16.6% | 15.8% |
| Single householder, no children | 11.4% | 12.0% | 10.8% |