| | La Vergne, TN | Sammamish, WA | United States |
| Population | 38,127 | 66,532 | 329,725,481 |
| Female Population | 49.8% | 51.8% | 50.5% |
| Male Population | 50.2% | 48.2% | 49.5% |
| Median Age | 33.1 | 39.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 32,713 | 57,656 | 309,327,143 |
| Population - 2000 | 18,687 | 34,104 | 285,036,114 |
| Population - 1990 | 7,499 | 23,294 | 251,960,433 |
| Pop. 2000 to Now | 90.8% | 93.4% | 15.6% |
| Pop. 1990 to Now | 375.3% | 183.2% | 30.8% |
| space4 | | | |
| Population Density | 1,551.1 | 3,255.5 | 93.4 |
| Land Area | 24.6 | 20.4 | 3,531,905.4 |
| Water Area | 0.2 | 3.7 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | La Vergne, TN | Sammamish, WA | United States |
| Age 0 to 4 | 7.0% | 6.1% | 5.9% |
| Age 5 to 9 | 6.1% | 7.3% | 6.1% |
| Age 10 to 14 | 9.9% | 9.9% | 6.6% |
| Age 15 to 17 | 5.7% | 6.3% | 3.9% |
| Age 18 to 20 | 4.1% | 2.7% | 4.0% |
| Age 21 to 24 | 4.9% | 2.9% | 5.2% |
| Age 25 to 34 | 14.9% | 8.0% | 13.8% |
| Age 35 to 44 | 15.1% | 18.2% | 12.9% |
| Age 45 to 54 | 14.2% | 19.1% | 12.6% |
| Age 55 to 59 | 5.7% | 6.5% | 6.7% |
| Age 60 to 64 | 4.9% | 5.3% | 6.3% |
| Age 65 to 74 | 5.1% | 5.6% | 9.6% |
| Age 75 to 84 | 1.9% | 1.7% | 4.5% |
| Age 85 and over | 0.4% | 0.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | La Vergne, TN | Sammamish, WA | United States |
| White | 48.0% | 55.8% | 59.4% |
| Black | 23.5% | 1.6% | 12.2% |
| Asian | 3.6% | 33.3% | 5.6% |
| Native American | 0.1% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.4% | 0.4% | 0.4% |
| Two or More Races | 4.0% | 4.9% | 3.2% |
| Hispanic | 20.6% | 3.5% | 18.4% |
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| Marriage & Family | | | |
| | La Vergne, TN | Sammamish, WA | United States |
| Married Population | 52.6% | 70.7% | 49.8% |
| Currently Married | 50.7% | 70.0% | 48.0% |
| Married but Separated | 1.8% | 0.7% | 1.8% |
| Single Population | 47.4% | 29.3% | 50.2% |
| Never Married | 32.7% | 22.7% | 33.8% |
| Divorced | 11.7% | 4.8% | 10.8% |
| Widowed | 3.0% | 1.9% | 5.6% |
| space5 | | | |
| Household Size | 2.93 | 3.03 | 2.60 |
| Households | 13,025 | 21,930 | 124,010,992 |
| Family Households | 10,045 | 19,138 | 80,755,759 |
| Married couple, w/children | 37.3% | 54.5% | 30.5% |
| Married couple, no children | 29.5% | 34.7% | 42.9% |
| Non Family Households | 2,980 | 2,792 | 43,255,233 |
| Single householder, w/children | 21.0% | 7.1% | 15.8% |
| Single householder, no children | 12.3% | 3.7% | 10.8% |