| | Bourbon, IN | Plymouth, IN | United States |
| Population | 1,752 | 10,209 | 329,725,481 |
| Female Population | 53.0% | 49.0% | 50.5% |
| Male Population | 47.0% | 51.0% | 49.5% |
| Median Age | 34.7 | 35.4 | 38.4 |
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| Population - 2010 | 1,811 | 10,131 | 309,327,143 |
| Population - 2000 | 1,691 | 9,840 | 285,036,114 |
| Population - 1990 | 1,672 | 8,303 | 251,960,433 |
| Pop. 2000 to Now | 3.3% | 1.2% | 15.6% |
| Pop. 1990 to Now | 4.4% | 19.9% | 30.8% |
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| Population Density | 1,522.2 | 1,356.9 | 93.4 |
| Land Area | 1.2 | 7.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Bourbon, IN | Plymouth, IN | United States |
| Age 0 to 4 | 10.2% | 7.4% | 5.9% |
| Age 5 to 9 | 7.0% | 7.2% | 6.1% |
| Age 10 to 14 | 11.3% | 6.2% | 6.6% |
| Age 15 to 17 | 4.0% | 6.2% | 3.9% |
| Age 18 to 20 | 4.1% | 5.3% | 4.0% |
| Age 21 to 24 | 1.9% | 5.1% | 5.2% |
| Age 25 to 34 | 11.9% | 11.8% | 13.8% |
| Age 35 to 44 | 13.1% | 12.3% | 12.9% |
| Age 45 to 54 | 12.1% | 11.8% | 12.6% |
| Age 55 to 59 | 5.9% | 4.6% | 6.7% |
| Age 60 to 64 | 6.6% | 7.7% | 6.3% |
| Age 65 to 74 | 5.4% | 6.3% | 9.6% |
| Age 75 to 84 | 3.3% | 3.8% | 4.5% |
| Age 85 and over | 3.1% | 4.3% | 1.9% |
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| Race | | | |
| | Bourbon, IN | Plymouth, IN | United States |
| White | 91.3% | 66.3% | 59.4% |
| Black | 0.7% | 1.8% | 12.2% |
| Asian | 0.6% | 0.1% | 5.6% |
| Native American | 0.4% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 3.0% | 2.2% | 3.2% |
| Hispanic | 3.8% | 29.6% | 18.4% |
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| Marriage & Family | | | |
| | Bourbon, IN | Plymouth, IN | United States |
| Married Population | 53.5% | 42.1% | 49.8% |
| Currently Married | 52.5% | 39.8% | 48.0% |
| Married but Separated | 1.0% | 2.3% | 1.8% |
| Single Population | 46.5% | 57.9% | 50.2% |
| Never Married | 20.4% | 35.5% | 33.8% |
| Divorced | 18.6% | 16.0% | 10.8% |
| Widowed | 7.5% | 6.5% | 5.6% |
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| Household Size | 2.66 | 2.61 | 2.60 |
| Households | 658 | 3,749 | 124,010,992 |
| Family Households | 433 | 2,153 | 80,755,759 |
| Married couple, w/children | 33.7% | 38.6% | 30.5% |
| Married couple, no children | 34.9% | 30.3% | 42.9% |
| Non Family Households | 225 | 1,596 | 43,255,233 |
| Single householder, w/children | 26.6% | 25.5% | 15.8% |
| Single householder, no children | 4.9% | 5.6% | 10.8% |