| | Leitchfield, KY | Bowling Green, KY | United States |
| Population | 6,873 | 63,616 | 321,418,820 |
| Population - 2010 | 6,640 | 56,407 | 308,745,538 |
| Population - 2000 | 6,139 | 49,296 | 285,036,114 |
| Population - 1990 | 4,965 | 40,641 | 251,960,433 |
| Pop. 1990 to Now | 38.43% | 56.53% | 27.57% |
| Pop. 2000 to Now | 11.96% | 29.05% | 12.76% |
| Pop. Density | 633 | 1,665 | 91 |
| Land Area | 11 | 38 | 3,531,905 |
| Water Area | 0 | 0 | 264,837 |
| Median Age | 35.7 | 27.8 | 37.4 |
| Female Population | 50.47% | 51.36% | 50.81% |
| Male Population | 49.54% | 48.65% | 49.19% |
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| EST. TOTAL POPULATION BY AGE | | | |
| | Leitchfield, KY | Bowling Green, KY | United States |
| Age 0 to 4 | 9.04% | 6.25% | 6.36% |
| Age 5 to 9 | 6.14% | 5.29% | 6.51% |
| Age 10 to 14 | 4.90% | 5.87% | 6.59% |
| Age 15 to 17 | 2.64% | 2.86% | 4.03% |
| Age 18 to 20 | 3.30% | 11.95% | 4.35% |
| Age 21 to 24 | 9.34% | 12.74% | 5.61% |
| Age 25 to 34 | 14.20% | 14.78% | 13.47% |
| Age 35 to 44 | 10.47% | 10.95% | 12.97% |
| Age 45 to 54 | 10.60% | 9.82% | 14.09% |
| Age 55 to 59 | 6.75% | 5.12% | 6.57% |
| Age 60 to 64 | 5.65% | 3.53% | 5.72% |
| Age 65 to 74 | 8.55% | 5.69% | 7.64% |
| Age 75 to 84 | 4.94% | 3.37% | 4.26% |
| Age 85 and over | 3.48% | 1.80% | 1.85% |
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| RACE | | | |
| | Leitchfield, KY | Bowling Green, KY | United States |
| White | 93.38% | 72.59% | 62.77% |
| Black | 3.04% | 14.30% | 12.24% |
| Asian | 0.00% | 4.14% | 4.95% |
| Native American | 0.04% | 0.14% | 0.66% |
| Hawaiian, Pacific Islander | 0.00% | 0.21% | 0.16% |
| Other | 0.35% | 0.10% | 0.20% |
| Two or More Races | 2.77% | 1.90% | 2.13% |
| Hispanic | 0.41% | 6.62% | 16.90% |
| Non-Hispanic | 99.59% | 93.38% | 83.10% |
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| FAMILY | | | |
| | Leitchfield, KY | Bowling Green, KY | United States |
| Households | 2,658 | 23,153 | 116,211,000 |
| Family Households | 1,722 | 12,255 | 76,958,100 |
| Non Family Households | 936 | 10,898 | 39,253,000 |
| Household Size | 2.41 | 2.34 | 2.63 |
| Married Population | 47.90% | 36.09% | 50.58% |
| Single Population | 52.10% | 63.91% | 49.42% |
| Now Married | 45.15% | 34.09% | 48.41% |
| Married but Separated | 2.75% | 2.00% | 2.17% |
| Never Married | 25.31% | 45.95% | 32.55% |
| Widowed | 12.27% | 5.89% | 5.95% |
| Divorced | 14.52% | 12.08% | 10.92% |
| Married, w/children | 35.89% | 26.77% | 31.68% |
| Married, no children | 32.40% | 37.01% | 41.44% |
| Single, w/children | 15.10% | 21.73% | 16.94% |
| Single, no children | 16.61% | 14.48% | 9.95% |