| | Larkspur, CO | Hereford, TX | United States |
| Population | 260 | 15,043 | 329,725,481 |
| Female Population | 49.2% | 50.5% | 50.5% |
| Male Population | 50.8% | 49.5% | 49.5% |
| Median Age | 53.6 | 29.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 184 | 15,439 | 309,327,143 |
| Population - 2000 | 234 | 14,597 | 285,036,114 |
| Population - 1990 | 232 | 14,745 | 251,960,433 |
| Pop. 2000 to Now | -13.3% | -1.4% | 15.6% |
| Pop. 1990 to Now | -12.5% | -2.4% | 30.8% |
| space4 | | | |
| Population Density | 164.0 | 2,450.8 | 93.4 |
| Land Area | 1.6 | 6.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Larkspur, CO | Hereford, TX | United States |
| Age 0 to 4 | 6.9% | 8.7% | 5.9% |
| Age 5 to 9 | 6.9% | 9.1% | 6.1% |
| Age 10 to 14 | 3.1% | 9.5% | 6.6% |
| Age 15 to 17 | 2.7% | 5.4% | 3.9% |
| Age 18 to 20 | 2.7% | 5.1% | 4.0% |
| Age 21 to 24 | 0.0% | 5.7% | 5.2% |
| Age 25 to 34 | 11.9% | 14.0% | 13.8% |
| Age 35 to 44 | 10.4% | 12.1% | 12.9% |
| Age 45 to 54 | 6.2% | 9.5% | 12.6% |
| Age 55 to 59 | 11.9% | 5.4% | 6.7% |
| Age 60 to 64 | 6.9% | 4.5% | 6.3% |
| Age 65 to 74 | 23.8% | 6.9% | 9.6% |
| Age 75 to 84 | 5.0% | 2.4% | 4.5% |
| Age 85 and over | 1.5% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Larkspur, CO | Hereford, TX | United States |
| White | 96.9% | 17.7% | 59.4% |
| Black | 0.0% | 0.9% | 12.2% |
| Asian | 0.0% | 1.1% | 5.6% |
| Native American | 0.0% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 0.0% | 0.2% | 3.2% |
| Hispanic | 3.1% | 79.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Larkspur, CO | Hereford, TX | United States |
| Married Population | 53.2% | 52.6% | 49.8% |
| Currently Married | 53.2% | 48.7% | 48.0% |
| Married but Separated | 0.0% | 3.9% | 1.8% |
| Single Population | 46.8% | 47.4% | 50.2% |
| Never Married | 23.1% | 30.1% | 33.8% |
| Divorced | 18.1% | 10.0% | 10.8% |
| Widowed | 5.6% | 7.3% | 5.6% |
| space5 | | | |
| Household Size | 2.50 | 3.08 | 2.60 |
| Households | 104 | 4,819 | 124,010,992 |
| Family Households | 72 | 3,566 | 80,755,759 |
| Married couple, w/children | 13.9% | 33.9% | 30.5% |
| Married couple, no children | 55.6% | 33.4% | 42.9% |
| Non Family Households | 32 | 1,253 | 43,255,233 |
| Single householder, w/children | 23.6% | 21.5% | 15.8% |
| Single householder, no children | 6.9% | 11.3% | 10.8% |