| | Sturgeon Bay, WI | Alpena, MI | United States |
| Population | 9,540 | 10,181 | 329,725,481 |
| Female Population | 51.0% | 50.9% | 50.5% |
| Male Population | 49.0% | 49.1% | 49.5% |
| Median Age | 45.8 | 44 | 38.4 |
| space3 | | | |
| Population - 2010 | 9,135 | 10,473 | 309,327,143 |
| Population - 2000 | 9,437 | 11,304 | 285,036,114 |
| Population - 1990 | 9,176 | 11,354 | 251,960,433 |
| Pop. 2000 to Now | -4.8% | -12.6% | 15.6% |
| Pop. 1990 to Now | -2.1% | -12.9% | 30.8% |
| space4 | | | |
| Population Density | 970.6 | 1,246.0 | 93.4 |
| Land Area | 9.8 | 8.2 | 3,531,905.4 |
| Water Area | 1.7 | 0.7 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sturgeon Bay, WI | Alpena, MI | United States |
| Age 0 to 4 | 3.5% | 4.4% | 5.9% |
| Age 5 to 9 | 6.0% | 4.4% | 6.1% |
| Age 10 to 14 | 7.1% | 6.5% | 6.6% |
| Age 15 to 17 | 3.2% | 4.0% | 3.9% |
| Age 18 to 20 | 2.3% | 2.1% | 4.0% |
| Age 21 to 24 | 3.9% | 4.4% | 5.2% |
| Age 25 to 34 | 9.7% | 10.9% | 13.8% |
| Age 35 to 44 | 12.9% | 14.4% | 12.9% |
| Age 45 to 54 | 12.7% | 12.5% | 12.6% |
| Age 55 to 59 | 8.1% | 6.7% | 6.7% |
| Age 60 to 64 | 9.0% | 8.7% | 6.3% |
| Age 65 to 74 | 14.6% | 10.3% | 9.6% |
| Age 75 to 84 | 4.4% | 6.3% | 4.5% |
| Age 85 and over | 2.6% | 4.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sturgeon Bay, WI | Alpena, MI | United States |
| White | 92.0% | 93.3% | 59.4% |
| Black | 1.0% | 1.4% | 12.2% |
| Asian | 0.3% | 0.2% | 5.6% |
| Native American | 2.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.7% | 1.6% | 3.2% |
| Hispanic | 2.0% | 3.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sturgeon Bay, WI | Alpena, MI | United States |
| Married Population | 47.3% | 41.4% | 49.8% |
| Currently Married | 45.2% | 40.2% | 48.0% |
| Married but Separated | 2.1% | 1.2% | 1.8% |
| Single Population | 52.7% | 58.6% | 50.2% |
| Never Married | 27.1% | 29.1% | 33.8% |
| Divorced | 20.7% | 20.9% | 10.8% |
| Widowed | 5.0% | 8.6% | 5.6% |
| space5 | | | |
| Household Size | 2.10 | 2.05 | 2.60 |
| Households | 4,455 | 4,789 | 124,010,992 |
| Family Households | 2,394 | 2,332 | 80,755,759 |
| Married couple, w/children | 25.9% | 21.1% | 30.5% |
| Married couple, no children | 48.0% | 48.6% | 42.9% |
| Non Family Households | 2,061 | 2,457 | 43,255,233 |
| Single householder, w/children | 20.1% | 24.3% | 15.8% |
| Single householder, no children | 6.1% | 6.0% | 10.8% |