| | Sherman, CT | Katonah, NY | United States |
| Population | 3,545 | 1,907 | 329,725,481 |
| Female Population | 47.2% | 58.6% | 50.5% |
| Male Population | 52.8% | 41.4% | 49.5% |
| Median Age | 58.2 | 35.3 | 38.4 |
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| Population - 2010 | 3,607 | 1,467 | 309,327,143 |
| Population - 2000 | 3,827 | 1,710 | 285,036,114 |
| Population - 1990 | 2,809 | 1,625 | 251,960,433 |
| Pop. 2000 to Now | -5.7% | 21.9% | 15.6% |
| Pop. 1990 to Now | 28.5% | 28.3% | 30.8% |
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| Population Density | 161.9 | 2,630.3 | 93.4 |
| Land Area | 21.9 | 0.7 | 3,531,905.4 |
| Water Area | 1.5 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Sherman, CT | Katonah, NY | United States |
| Age 0 to 4 | 3.4% | 11.2% | 5.9% |
| Age 5 to 9 | 1.7% | 11.6% | 6.1% |
| Age 10 to 14 | 6.6% | 5.2% | 6.6% |
| Age 15 to 17 | 3.9% | 3.9% | 3.9% |
| Age 18 to 20 | 1.6% | 2.6% | 4.0% |
| Age 21 to 24 | 3.0% | 2.3% | 5.2% |
| Age 25 to 34 | 5.6% | 12.9% | 13.8% |
| Age 35 to 44 | 5.5% | 9.8% | 12.9% |
| Age 45 to 54 | 11.4% | 9.5% | 12.6% |
| Age 55 to 59 | 12.6% | 8.1% | 6.7% |
| Age 60 to 64 | 19.0% | 8.5% | 6.3% |
| Age 65 to 74 | 13.2% | 8.9% | 9.6% |
| Age 75 to 84 | 8.3% | 4.2% | 4.5% |
| Age 85 and over | 4.3% | 1.2% | 1.9% |
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| Race | | | |
| | Sherman, CT | Katonah, NY | United States |
| White | 85.5% | 78.8% | 59.4% |
| Black | 0.6% | 0.0% | 12.2% |
| Asian | 1.5% | 4.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 4.4% | 0.0% | 0.4% |
| Two or More Races | 1.7% | 0.0% | 3.2% |
| Hispanic | 6.3% | 17.2% | 18.4% |
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| Marriage & Family | | | |
| | Sherman, CT | Katonah, NY | United States |
| Married Population | 59.1% | 60.5% | 49.8% |
| Currently Married | 57.9% | 60.5% | 48.0% |
| Married but Separated | 1.1% | 0.0% | 1.8% |
| Single Population | 40.9% | 39.5% | 50.2% |
| Never Married | 19.5% | 20.7% | 33.8% |
| Divorced | 10.9% | 16.7% | 10.8% |
| Widowed | 10.6% | 2.1% | 5.6% |
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| Household Size | 2.26 | 2.88 | 2.60 |
| Households | 1,566 | 663 | 124,010,992 |
| Family Households | 1,068 | 551 | 80,755,759 |
| Married couple, w/children | 22.3% | 37.4% | 30.5% |
| Married couple, no children | 61.6% | 36.5% | 42.9% |
| Non Family Households | 498 | 112 | 43,255,233 |
| Single householder, w/children | 4.7% | 18.1% | 15.8% |
| Single householder, no children | 11.4% | 8.0% | 10.8% |