| | Ogallala, NE | Walsenburg, CO | United States |
| Population | 4,831 | 3,034 | 329,725,481 |
| Female Population | 50.9% | 47.2% | 50.5% |
| Male Population | 49.1% | 52.8% | 49.5% |
| Median Age | 48.3 | 46.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,733 | 3,046 | 309,327,143 |
| Population - 2000 | 4,930 | 4,182 | 285,036,114 |
| Population - 1990 | 5,095 | 3,300 | 251,960,433 |
| Pop. 2000 to Now | -9.3% | -28.2% | 15.6% |
| Pop. 1990 to Now | -12.2% | -9.0% | 30.8% |
| space4 | | | |
| Population Density | 974.6 | 1,014.7 | 93.4 |
| Land Area | 5.0 | 3.0 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Ogallala, NE | Walsenburg, CO | United States |
| Age 0 to 4 | 5.7% | 5.0% | 5.9% |
| Age 5 to 9 | 7.7% | 6.8% | 6.1% |
| Age 10 to 14 | 6.4% | 2.7% | 6.6% |
| Age 15 to 17 | 2.8% | 4.8% | 3.9% |
| Age 18 to 20 | 1.7% | 9.1% | 4.0% |
| Age 21 to 24 | 3.6% | 2.6% | 5.2% |
| Age 25 to 34 | 10.9% | 6.6% | 13.8% |
| Age 35 to 44 | 9.6% | 10.3% | 12.9% |
| Age 45 to 54 | 11.0% | 12.4% | 12.6% |
| Age 55 to 59 | 8.3% | 8.8% | 6.7% |
| Age 60 to 64 | 6.5% | 3.0% | 6.3% |
| Age 65 to 74 | 11.2% | 14.3% | 9.6% |
| Age 75 to 84 | 7.5% | 10.5% | 4.5% |
| Age 85 and over | 7.1% | 2.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Ogallala, NE | Walsenburg, CO | United States |
| White | 85.8% | 46.8% | 59.4% |
| Black | 1.7% | 0.0% | 12.2% |
| Asian | 0.6% | 0.1% | 5.6% |
| Native American | 0.0% | 4.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.7% | 0.4% |
| Two or More Races | 0.9% | 2.1% | 3.2% |
| Hispanic | 11.0% | 45.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Ogallala, NE | Walsenburg, CO | United States |
| Married Population | 47.6% | 37.7% | 49.8% |
| Currently Married | 46.2% | 37.6% | 48.0% |
| Married but Separated | 1.4% | 0.1% | 1.8% |
| Single Population | 52.4% | 62.3% | 50.2% |
| Never Married | 22.3% | 35.7% | 33.8% |
| Divorced | 16.4% | 13.5% | 10.8% |
| Widowed | 13.7% | 13.1% | 5.6% |
| space5 | | | |
| Household Size | 2.11 | 2.48 | 2.60 |
| Households | 2,266 | 1,201 | 124,010,992 |
| Family Households | 1,061 | 618 | 80,755,759 |
| Married couple, w/children | 22.9% | 18.4% | 30.5% |
| Married couple, no children | 57.4% | 43.9% | 42.9% |
| Non Family Households | 1,205 | 583 | 43,255,233 |
| Single householder, w/children | 14.0% | 13.9% | 15.8% |
| Single householder, no children | 5.7% | 23.8% | 10.8% |