| | Hiram, ME | Auburn, ME | United States |
| Population | 1,674 | 23,790 | 329,725,481 |
| Female Population | 53.9% | 52.1% | 50.5% |
| Male Population | 46.1% | 47.9% | 49.5% |
| Median Age | 38.3 | 39.4 | 38.4 |
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| Population - 2010 | 1,619 | 23,052 | 309,327,143 |
| Population - 2000 | 1,423 | 23,203 | 285,036,114 |
| Population - 1990 | 1,260 | 24,309 | 251,960,433 |
| Pop. 2000 to Now | 16.6% | 0.9% | 15.6% |
| Pop. 1990 to Now | 31.7% | -3.7% | 30.8% |
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| Population Density | 44.6 | 400.9 | 93.4 |
| Land Area | 37.5 | 59.3 | 3,531,905.4 |
| Water Area | 1.3 | 6.4 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Hiram, ME | Auburn, ME | United States |
| Age 0 to 4 | 6.5% | 5.2% | 5.9% |
| Age 5 to 9 | 4.2% | 5.7% | 6.1% |
| Age 10 to 14 | 9.0% | 7.0% | 6.6% |
| Age 15 to 17 | 3.4% | 3.6% | 3.9% |
| Age 18 to 20 | 2.6% | 3.6% | 4.0% |
| Age 21 to 24 | 4.2% | 6.1% | 5.2% |
| Age 25 to 34 | 16.2% | 12.8% | 13.8% |
| Age 35 to 44 | 8.1% | 11.5% | 12.9% |
| Age 45 to 54 | 11.4% | 12.6% | 12.6% |
| Age 55 to 59 | 7.8% | 5.9% | 6.7% |
| Age 60 to 64 | 12.8% | 7.0% | 6.3% |
| Age 65 to 74 | 7.0% | 12.8% | 9.6% |
| Age 75 to 84 | 5.3% | 4.3% | 4.5% |
| Age 85 and over | 1.6% | 2.1% | 1.9% |
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| Race | | | |
| | Hiram, ME | Auburn, ME | United States |
| White | 84.8% | 90.0% | 59.4% |
| Black | 0.0% | 1.3% | 12.2% |
| Asian | 0.0% | 0.7% | 5.6% |
| Native American | 0.7% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.7% | 0.4% |
| Two or More Races | 11.0% | 5.1% | 3.2% |
| Hispanic | 3.5% | 2.1% | 18.4% |
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| Marriage & Family | | | |
| | Hiram, ME | Auburn, ME | United States |
| Married Population | 44.9% | 44.6% | 49.8% |
| Currently Married | 44.3% | 44.4% | 48.0% |
| Married but Separated | 0.6% | 0.2% | 1.8% |
| Single Population | 55.1% | 55.4% | 50.2% |
| Never Married | 34.5% | 35.7% | 33.8% |
| Divorced | 16.7% | 13.3% | 10.8% |
| Widowed | 3.9% | 6.4% | 5.6% |
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| Household Size | 2.71 | 2.26 | 2.60 |
| Households | 617 | 10,249 | 124,010,992 |
| Family Households | 365 | 5,650 | 80,755,759 |
| Married couple, w/children | 29.6% | 27.2% | 30.5% |
| Married couple, no children | 48.2% | 45.3% | 42.9% |
| Non Family Households | 252 | 4,599 | 43,255,233 |
| Single householder, w/children | 15.6% | 18.4% | 15.8% |
| Single householder, no children | 6.6% | 9.1% | 10.8% |