| | Alvin, TX | Madison, IN | United States |
| Population | 26,982 | 12,227 | 329,725,481 |
| Female Population | 51.7% | 56.6% | 50.5% |
| Male Population | 48.3% | 43.4% | 49.5% |
| Median Age | 32.9 | 43.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 24,247 | 11,966 | 309,327,143 |
| Population - 2000 | 21,413 | 12,004 | 285,036,114 |
| Population - 1990 | 19,220 | 12,006 | 251,960,433 |
| Pop. 2000 to Now | 26.8% | -2.1% | 15.6% |
| Pop. 1990 to Now | 41.2% | -2.1% | 30.8% |
| space4 | | | |
| Population Density | 1,114.5 | 1,424.1 | 93.4 |
| Land Area | 24.2 | 8.6 | 3,531,905.4 |
| Water Area | 0.9 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Alvin, TX | Madison, IN | United States |
| Age 0 to 4 | 8.1% | 4.8% | 5.9% |
| Age 5 to 9 | 8.7% | 4.3% | 6.1% |
| Age 10 to 14 | 6.8% | 4.6% | 6.6% |
| Age 15 to 17 | 4.4% | 3.4% | 3.9% |
| Age 18 to 20 | 3.7% | 4.2% | 4.0% |
| Age 21 to 24 | 5.8% | 4.1% | 5.2% |
| Age 25 to 34 | 15.2% | 12.2% | 13.8% |
| Age 35 to 44 | 13.8% | 14.0% | 12.9% |
| Age 45 to 54 | 10.6% | 15.3% | 12.6% |
| Age 55 to 59 | 5.0% | 8.2% | 6.7% |
| Age 60 to 64 | 4.3% | 6.5% | 6.3% |
| Age 65 to 74 | 7.9% | 10.4% | 9.6% |
| Age 75 to 84 | 3.8% | 5.6% | 4.5% |
| Age 85 and over | 1.9% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Alvin, TX | Madison, IN | United States |
| White | 50.4% | 87.7% | 59.4% |
| Black | 4.9% | 3.9% | 12.2% |
| Asian | 1.4% | 1.2% | 5.6% |
| Native American | 0.1% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 1.1% | 0.4% |
| Two or More Races | 1.2% | 1.9% | 3.2% |
| Hispanic | 41.8% | 4.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Alvin, TX | Madison, IN | United States |
| Married Population | 46.5% | 39.4% | 49.8% |
| Currently Married | 44.8% | 37.2% | 48.0% |
| Married but Separated | 1.7% | 2.2% | 1.8% |
| Single Population | 53.5% | 60.6% | 50.2% |
| Never Married | 34.1% | 31.0% | 33.8% |
| Divorced | 12.6% | 21.5% | 10.8% |
| Widowed | 6.9% | 8.0% | 5.6% |
| space5 | | | |
| Household Size | 2.71 | 2.18 | 2.60 |
| Households | 9,927 | 5,064 | 124,010,992 |
| Family Households | 6,735 | 2,650 | 80,755,759 |
| Married couple, w/children | 35.7% | 32.1% | 30.5% |
| Married couple, no children | 26.8% | 38.3% | 42.9% |
| Non Family Households | 3,192 | 2,414 | 43,255,233 |
| Single householder, w/children | 24.9% | 18.9% | 15.8% |
| Single householder, no children | 12.6% | 10.6% | 10.8% |