| | Bowdoinham, ME | Richmond, ME | United States |
| Population | 3,042 | 3,503 | 329,725,481 |
| Female Population | 49.3% | 49.2% | 50.5% |
| Male Population | 50.7% | 50.8% | 49.5% |
| Median Age | 47.6 | 35.8 | 38.4 |
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| Population - 2010 | 2,885 | 3,407 | 309,327,143 |
| Population - 2000 | 2,612 | 3,298 | 285,036,114 |
| Population - 1990 | 2,192 | 3,072 | 251,960,433 |
| Pop. 2000 to Now | 18.3% | 5.7% | 15.6% |
| Pop. 1990 to Now | 41.0% | 13.4% | 30.8% |
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| Population Density | 88.4 | 115.2 | 93.4 |
| Land Area | 34.4 | 30.4 | 3,531,905.4 |
| Water Area | 4.8 | 1.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Bowdoinham, ME | Richmond, ME | United States |
| Age 0 to 4 | 8.9% | 7.7% | 5.9% |
| Age 5 to 9 | 4.3% | 5.5% | 6.1% |
| Age 10 to 14 | 3.9% | 4.9% | 6.6% |
| Age 15 to 17 | 1.7% | 5.1% | 3.9% |
| Age 18 to 20 | 0.0% | 7.2% | 4.0% |
| Age 21 to 24 | 0.8% | 5.6% | 5.2% |
| Age 25 to 34 | 12.0% | 12.7% | 13.8% |
| Age 35 to 44 | 17.5% | 11.4% | 12.9% |
| Age 45 to 54 | 9.1% | 12.6% | 12.6% |
| Age 55 to 59 | 5.1% | 5.3% | 6.7% |
| Age 60 to 64 | 21.4% | 7.2% | 6.3% |
| Age 65 to 74 | 13.3% | 8.6% | 9.6% |
| Age 75 to 84 | 1.2% | 4.7% | 4.5% |
| Age 85 and over | 1.0% | 1.5% | 1.9% |
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| Race | | | |
| | Bowdoinham, ME | Richmond, ME | United States |
| White | 95.9% | 96.7% | 59.4% |
| Black | 1.0% | 0.0% | 12.2% |
| Asian | 0.2% | 0.0% | 5.6% |
| Native American | 0.6% | 0.6% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.4% | 1.5% | 3.2% |
| Hispanic | 0.9% | 1.2% | 18.4% |
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| Marriage & Family | | | |
| | Bowdoinham, ME | Richmond, ME | United States |
| Married Population | 64.3% | 42.8% | 49.8% |
| Currently Married | 63.7% | 42.2% | 48.0% |
| Married but Separated | 0.6% | 0.6% | 1.8% |
| Single Population | 35.7% | 57.2% | 50.2% |
| Never Married | 17.2% | 34.6% | 33.8% |
| Divorced | 17.4% | 16.2% | 10.8% |
| Widowed | 1.1% | 6.4% | 5.6% |
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| Household Size | 2.54 | 2.34 | 2.60 |
| Households | 1,196 | 1,484 | 124,010,992 |
| Family Households | 1,007 | 876 | 80,755,759 |
| Married couple, w/children | 18.8% | 29.5% | 30.5% |
| Married couple, no children | 59.5% | 40.9% | 42.9% |
| Non Family Households | 189 | 608 | 43,255,233 |
| Single householder, w/children | 9.3% | 20.3% | 15.8% |
| Single householder, no children | 12.4% | 9.4% | 10.8% |