| | Henning township, MN | Sauk Centre, MN | United States |
| Population | 337 | 4,531 | 329,725,481 |
| Female Population | 47.8% | 54.5% | 50.5% |
| Male Population | 52.2% | 45.5% | 49.5% |
| Median Age | 50.5 | 37.8 | 38.4 |
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| Population - 2010 | 378 | 4,301 | 309,327,143 |
| Population - 2000 | 426 | 3,930 | 285,036,114 |
| Population - 1990 | 376 | 3,581 | 251,960,433 |
| Pop. 2000 to Now | -12.2% | 15.3% | 15.6% |
| Pop. 1990 to Now | -0.5% | 26.6% | 30.8% |
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| Population Density | 10.5 | 1,095.0 | 93.4 |
| Land Area | 32.2 | 4.1 | 3,531,905.4 |
| Water Area | 0.4 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Henning township, MN | Sauk Centre, MN | United States |
| Age 0 to 4 | 4.2% | 6.9% | 5.9% |
| Age 5 to 9 | 3.9% | 6.4% | 6.1% |
| Age 10 to 14 | 6.8% | 4.2% | 6.6% |
| Age 15 to 17 | 4.2% | 2.7% | 3.9% |
| Age 18 to 20 | 3.0% | 4.8% | 4.0% |
| Age 21 to 24 | 4.5% | 4.7% | 5.2% |
| Age 25 to 34 | 8.6% | 16.2% | 13.8% |
| Age 35 to 44 | 7.7% | 10.2% | 12.9% |
| Age 45 to 54 | 16.9% | 6.4% | 12.6% |
| Age 55 to 59 | 8.3% | 7.9% | 6.7% |
| Age 60 to 64 | 5.6% | 8.6% | 6.3% |
| Age 65 to 74 | 13.4% | 10.3% | 9.6% |
| Age 75 to 84 | 11.0% | 4.8% | 4.5% |
| Age 85 and over | 2.1% | 6.0% | 1.9% |
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| Race | | | |
| | Henning township, MN | Sauk Centre, MN | United States |
| White | 97.0% | 85.9% | 59.4% |
| Black | 0.0% | 0.6% | 12.2% |
| Asian | 0.0% | 0.9% | 5.6% |
| Native American | 0.0% | 1.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.4% | 2.8% | 3.2% |
| Hispanic | 0.6% | 8.4% | 18.4% |
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| Marriage & Family | | | |
| | Henning township, MN | Sauk Centre, MN | United States |
| Married Population | 71.4% | 47.7% | 49.8% |
| Currently Married | 71.1% | 46.9% | 48.0% |
| Married but Separated | 0.3% | 0.8% | 1.8% |
| Single Population | 28.6% | 52.3% | 50.2% |
| Never Married | 20.2% | 31.9% | 33.8% |
| Divorced | 4.9% | 14.8% | 10.8% |
| Widowed | 3.5% | 5.6% | 5.6% |
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| Household Size | 2.67 | 2.16 | 2.60 |
| Households | 126 | 2,052 | 124,010,992 |
| Family Households | 109 | 1,217 | 80,755,759 |
| Married couple, w/children | 26.6% | 24.6% | 30.5% |
| Married couple, no children | 65.1% | 47.8% | 42.9% |
| Non Family Households | 17 | 835 | 43,255,233 |
| Single householder, w/children | 5.5% | 16.7% | 15.8% |
| Single householder, no children | 2.8% | 10.9% | 10.8% |