| | Wallis, TX | Citrus Heights, CA | United States |
| Population | 1,568 | 87,521 | 329,725,481 |
| Female Population | 40.6% | 50.9% | 50.5% |
| Male Population | 59.4% | 49.1% | 49.5% |
| Median Age | 33.9 | 37.9 | 38.4 |
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| Population - 2010 | 1,242 | 83,188 | 309,327,143 |
| Population - 2000 | 1,172 | 85,071 | 285,036,114 |
| Population - 1990 | 1,001 | 107,439 | 251,960,433 |
| Pop. 2000 to Now | 13.1% | 3.1% | 15.6% |
| Pop. 1990 to Now | 32.4% | -18.4% | 30.8% |
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| Population Density | 1,048.8 | 6,150.9 | 93.4 |
| Land Area | 1.5 | 14.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Wallis, TX | Citrus Heights, CA | United States |
| Age 0 to 4 | 13.9% | 5.1% | 5.9% |
| Age 5 to 9 | 3.5% | 5.0% | 6.1% |
| Age 10 to 14 | 5.9% | 6.6% | 6.6% |
| Age 15 to 17 | 2.9% | 3.9% | 3.9% |
| Age 18 to 20 | 0.4% | 3.0% | 4.0% |
| Age 21 to 24 | 4.7% | 5.1% | 5.2% |
| Age 25 to 34 | 20.8% | 17.0% | 13.8% |
| Age 35 to 44 | 13.6% | 12.8% | 12.9% |
| Age 45 to 54 | 4.0% | 11.8% | 12.6% |
| Age 55 to 59 | 8.7% | 6.6% | 6.7% |
| Age 60 to 64 | 5.7% | 6.5% | 6.3% |
| Age 65 to 74 | 10.8% | 9.9% | 9.6% |
| Age 75 to 84 | 3.7% | 4.2% | 4.5% |
| Age 85 and over | 1.4% | 2.4% | 1.9% |
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| Race | | | |
| | Wallis, TX | Citrus Heights, CA | United States |
| White | 40.1% | 68.4% | 59.4% |
| Black | 13.8% | 3.4% | 12.2% |
| Asian | 0.0% | 4.0% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 3.6% | 0.4% | 0.4% |
| Two or More Races | 6.1% | 5.0% | 3.2% |
| Hispanic | 36.4% | 18.4% | 18.4% |
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| Marriage & Family | | | |
| | Wallis, TX | Citrus Heights, CA | United States |
| Married Population | 56.6% | 46.6% | 49.8% |
| Currently Married | 55.9% | 44.1% | 48.0% |
| Married but Separated | 0.7% | 2.5% | 1.8% |
| Single Population | 43.4% | 53.4% | 50.2% |
| Never Married | 33.3% | 34.1% | 33.8% |
| Divorced | 6.1% | 13.3% | 10.8% |
| Widowed | 4.1% | 6.0% | 5.6% |
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| Household Size | 2.24 | 2.61 | 2.60 |
| Households | 693 | 33,333 | 124,010,992 |
| Family Households | 432 | 20,730 | 80,755,759 |
| Married couple, w/children | 31.5% | 28.1% | 30.5% |
| Married couple, no children | 39.8% | 42.7% | 42.9% |
| Non Family Households | 261 | 12,603 | 43,255,233 |
| Single householder, w/children | 26.4% | 16.0% | 15.8% |
| Single householder, no children | 2.3% | 13.1% | 10.8% |