| | Irving, TX | Rock Hill, SC | United States |
| Population | 254,184 | 72,883 | 329,725,481 |
| Female Population | 49.3% | 54.1% | 50.5% |
| Male Population | 50.7% | 45.9% | 49.5% |
| Median Age | 32.3 | 34.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 216,858 | 66,872 | 309,327,143 |
| Population - 2000 | 191,615 | 49,765 | 285,036,114 |
| Population - 1990 | 155,037 | 41,643 | 251,960,433 |
| Pop. 2000 to Now | 25.7% | 53.4% | 15.6% |
| Pop. 1990 to Now | 55.4% | 83.3% | 30.8% |
| space4 | | | |
| Population Density | 3,790.7 | 1,916.6 | 93.4 |
| Land Area | 67.1 | 38.0 | 3,531,905.4 |
| Water Area | 1.0 | 0.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Irving, TX | Rock Hill, SC | United States |
| Age 0 to 4 | 8.6% | 6.4% | 5.9% |
| Age 5 to 9 | 7.2% | 6.4% | 6.1% |
| Age 10 to 14 | 7.1% | 6.3% | 6.6% |
| Age 15 to 17 | 4.2% | 4.0% | 3.9% |
| Age 18 to 20 | 3.4% | 5.9% | 4.0% |
| Age 21 to 24 | 5.3% | 6.8% | 5.2% |
| Age 25 to 34 | 19.1% | 15.7% | 13.8% |
| Age 35 to 44 | 16.2% | 11.8% | 12.9% |
| Age 45 to 54 | 12.0% | 11.8% | 12.6% |
| Age 55 to 59 | 5.1% | 5.5% | 6.7% |
| Age 60 to 64 | 3.8% | 5.6% | 6.3% |
| Age 65 to 74 | 5.2% | 8.7% | 9.6% |
| Age 75 to 84 | 2.1% | 3.6% | 4.5% |
| Age 85 and over | 0.7% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Irving, TX | Rock Hill, SC | United States |
| White | 19.5% | 51.1% | 59.4% |
| Black | 13.2% | 38.5% | 12.2% |
| Asian | 21.4% | 1.9% | 5.6% |
| Native American | 0.3% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.4% | 0.4% |
| Two or More Races | 2.0% | 2.2% | 3.2% |
| Hispanic | 43.2% | 5.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Irving, TX | Rock Hill, SC | United States |
| Married Population | 52.4% | 42.7% | 49.8% |
| Currently Married | 50.0% | 39.8% | 48.0% |
| Married but Separated | 2.5% | 2.9% | 1.8% |
| Single Population | 47.6% | 57.3% | 50.2% |
| Never Married | 35.4% | 40.9% | 33.8% |
| Divorced | 9.3% | 10.8% | 10.8% |
| Widowed | 2.9% | 5.7% | 5.6% |
| space5 | | | |
| Household Size | 2.76 | 2.37 | 2.60 |
| Households | 91,752 | 29,588 | 124,010,992 |
| Family Households | 61,002 | 17,390 | 80,755,759 |
| Married couple, w/children | 39.3% | 24.7% | 30.5% |
| Married couple, no children | 32.1% | 37.9% | 42.9% |
| Non Family Households | 30,750 | 12,198 | 43,255,233 |
| Single householder, w/children | 17.4% | 24.2% | 15.8% |
| Single householder, no children | 11.2% | 13.2% | 10.8% |