| | Lebanon, SD | Bowdle, SD | United States |
| Population | 85 | 416 | 329,725,481 |
| Female Population | 75.3% | 50.5% | 50.5% |
| Male Population | 24.7% | 49.5% | 49.5% |
| Median Age | 29.3 | 43.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 47 | 525 | 309,327,143 |
| Population - 2000 | 86 | 571 | 285,036,114 |
| Population - 1990 | 115 | 589 | 251,960,433 |
| Pop. 2000 to Now | -50.0% | -18.9% | 15.6% |
| Pop. 1990 to Now | -62.6% | -21.4% | 30.8% |
| space4 | | | |
| Population Density | 160.4 | 652.0 | 93.4 |
| Land Area | 0.5 | 0.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lebanon, SD | Bowdle, SD | United States |
| Age 0 to 4 | 12.9% | 2.4% | 5.9% |
| Age 5 to 9 | 14.1% | 10.1% | 6.1% |
| Age 10 to 14 | 0.0% | 3.4% | 6.6% |
| Age 15 to 17 | 0.0% | 8.2% | 3.9% |
| Age 18 to 20 | 0.0% | 4.6% | 4.0% |
| Age 21 to 24 | 0.0% | 2.4% | 5.2% |
| Age 25 to 34 | 50.6% | 5.3% | 13.8% |
| Age 35 to 44 | 0.0% | 16.1% | 12.9% |
| Age 45 to 54 | 4.7% | 4.3% | 12.6% |
| Age 55 to 59 | 7.1% | 3.6% | 6.7% |
| Age 60 to 64 | 4.7% | 6.3% | 6.3% |
| Age 65 to 74 | 2.4% | 19.2% | 9.6% |
| Age 75 to 84 | 1.2% | 7.9% | 4.5% |
| Age 85 and over | 2.4% | 6.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lebanon, SD | Bowdle, SD | United States |
| White | 100.0% | 87.3% | 59.4% |
| Black | 0.0% | 2.4% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 10.1% | 3.2% |
| Hispanic | 0.0% | 0.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lebanon, SD | Bowdle, SD | United States |
| Married Population | 12.9% | 48.0% | 49.8% |
| Currently Married | 9.7% | 48.0% | 48.0% |
| Married but Separated | 3.2% | 0.0% | 1.8% |
| Single Population | 87.1% | 52.0% | 50.2% |
| Never Married | 62.9% | 26.0% | 33.8% |
| Divorced | 16.1% | 10.0% | 10.8% |
| Widowed | 8.1% | 16.0% | 5.6% |
| space5 | | | |
| Household Size | 4.47 | 2.42 | 2.60 |
| Households | 19 | 159 | 124,010,992 |
| Family Households | 14 | 99 | 80,755,759 |
| Married couple, w/children | 0.0% | 17.2% | 30.5% |
| Married couple, no children | 21.4% | 60.6% | 42.9% |
| Non Family Households | 5 | 60 | 43,255,233 |
| Single householder, w/children | 78.6% | 19.2% | 15.8% |
| Single householder, no children | 0.0% | 3.0% | 10.8% |