| | Arnold, MD | Frisco, TX | United States |
| Population | 25,056 | 193,140 | 329,725,481 |
| Female Population | 51.2% | 50.5% | 50.5% |
| Male Population | 48.8% | 49.5% | 49.5% |
| Median Age | 38.2 | 37.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 22,483 | 118,191 | 309,327,143 |
| Population - 2000 | 23,422 | 33,714 | 285,036,114 |
| Population - 1990 | 20,261 | 6,141 | 251,960,433 |
| Pop. 2000 to Now | 1.8% | 522.8% | 15.6% |
| Pop. 1990 to Now | 17.7% | 3,319.3% | 30.8% |
| space4 | | | |
| Population Density | 2,316.1 | 2,841.8 | 93.4 |
| Land Area | 10.8 | 68.0 | 3,531,905.4 |
| Water Area | 2.7 | 0.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Arnold, MD | Frisco, TX | United States |
| Age 0 to 4 | 5.9% | 5.8% | 5.9% |
| Age 5 to 9 | 8.0% | 8.2% | 6.1% |
| Age 10 to 14 | 8.4% | 9.7% | 6.6% |
| Age 15 to 17 | 5.7% | 5.8% | 3.9% |
| Age 18 to 20 | 3.5% | 3.0% | 4.0% |
| Age 21 to 24 | 3.3% | 4.0% | 5.2% |
| Age 25 to 34 | 8.7% | 9.6% | 13.8% |
| Age 35 to 44 | 15.7% | 18.4% | 12.9% |
| Age 45 to 54 | 13.4% | 17.8% | 12.6% |
| Age 55 to 59 | 7.9% | 4.8% | 6.7% |
| Age 60 to 64 | 5.0% | 3.8% | 6.3% |
| Age 65 to 74 | 9.3% | 5.8% | 9.6% |
| Age 75 to 84 | 3.6% | 2.7% | 4.5% |
| Age 85 and over | 1.5% | 0.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Arnold, MD | Frisco, TX | United States |
| White | 77.1% | 50.8% | 59.4% |
| Black | 5.1% | 8.3% | 12.2% |
| Asian | 3.5% | 24.1% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.5% | 0.4% |
| Two or More Races | 5.4% | 3.3% | 3.2% |
| Hispanic | 8.8% | 12.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Arnold, MD | Frisco, TX | United States |
| Married Population | 61.4% | 64.4% | 49.8% |
| Currently Married | 59.4% | 63.5% | 48.0% |
| Married but Separated | 2.0% | 0.9% | 1.8% |
| Single Population | 38.6% | 35.6% | 50.2% |
| Never Married | 26.5% | 24.8% | 33.8% |
| Divorced | 9.1% | 7.4% | 10.8% |
| Widowed | 3.1% | 3.4% | 5.6% |
| space5 | | | |
| Household Size | 2.88 | 2.90 | 2.60 |
| Households | 8,633 | 66,615 | 124,010,992 |
| Family Households | 6,788 | 50,829 | 80,755,759 |
| Married couple, w/children | 42.1% | 55.8% | 30.5% |
| Married couple, no children | 38.8% | 31.9% | 42.9% |
| Non Family Households | 1,845 | 15,786 | 43,255,233 |
| Single householder, w/children | 11.2% | 8.5% | 15.8% |
| Single householder, no children | 7.9% | 3.8% | 10.8% |