| | Spring Hill, FL | Zephyrhills, FL | United States |
| Population | 114,706 | 16,845 | 329,725,481 |
| Female Population | 51.1% | 54.9% | 50.5% |
| Male Population | 48.9% | 45.1% | 49.5% |
| Median Age | 43.3 | 51.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 96,702 | 13,898 | 309,327,143 |
| Population - 2000 | 69,078 | 10,833 | 285,036,114 |
| Population - 1990 | 31,117 | 8,220 | 251,960,433 |
| Pop. 2000 to Now | 69.3% | 57.1% | 15.6% |
| Pop. 1990 to Now | 275.8% | 107.0% | 30.8% |
| space4 | | | |
| Population Density | 1,916.2 | 1,799.9 | 93.4 |
| Land Area | 59.9 | 9.4 | 3,531,905.4 |
| Water Area | 2.4 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Spring Hill, FL | Zephyrhills, FL | United States |
| Age 0 to 4 | 5.3% | 4.8% | 5.9% |
| Age 5 to 9 | 5.1% | 4.6% | 6.1% |
| Age 10 to 14 | 6.3% | 5.9% | 6.6% |
| Age 15 to 17 | 4.0% | 3.7% | 3.9% |
| Age 18 to 20 | 3.1% | 2.3% | 4.0% |
| Age 21 to 24 | 3.9% | 4.0% | 5.2% |
| Age 25 to 34 | 11.7% | 10.5% | 13.8% |
| Age 35 to 44 | 12.0% | 8.6% | 12.9% |
| Age 45 to 54 | 12.7% | 8.8% | 12.6% |
| Age 55 to 59 | 6.8% | 5.8% | 6.7% |
| Age 60 to 64 | 6.7% | 6.6% | 6.3% |
| Age 65 to 74 | 12.7% | 18.1% | 9.6% |
| Age 75 to 84 | 7.1% | 11.9% | 4.5% |
| Age 85 and over | 2.6% | 4.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Spring Hill, FL | Zephyrhills, FL | United States |
| White | 70.2% | 71.4% | 59.4% |
| Black | 5.1% | 4.8% | 12.2% |
| Asian | 1.7% | 1.2% | 5.6% |
| Native American | 0.3% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 0.7% | 0.6% | 0.4% |
| Two or More Races | 2.9% | 1.6% | 3.2% |
| Hispanic | 19.1% | 20.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Spring Hill, FL | Zephyrhills, FL | United States |
| Married Population | 51.6% | 47.0% | 49.8% |
| Currently Married | 49.9% | 44.8% | 48.0% |
| Married but Separated | 1.8% | 2.2% | 1.8% |
| Single Population | 48.4% | 53.0% | 50.2% |
| Never Married | 27.7% | 24.5% | 33.8% |
| Divorced | 12.5% | 18.2% | 10.8% |
| Widowed | 8.2% | 10.3% | 5.6% |
| space5 | | | |
| Household Size | 2.57 | 2.17 | 2.60 |
| Households | 44,136 | 7,554 | 124,010,992 |
| Family Households | 30,979 | 4,306 | 80,755,759 |
| Married couple, w/children | 25.7% | 19.8% | 30.5% |
| Married couple, no children | 46.9% | 49.9% | 42.9% |
| Non Family Households | 13,157 | 3,248 | 43,255,233 |
| Single householder, w/children | 15.0% | 15.8% | 15.8% |
| Single householder, no children | 12.5% | 14.5% | 10.8% |