| | Brown township (Lycoming County), PA | Lock Haven, PA | United States |
| Population | 80 | 8,458 | 329,725,481 |
| Female Population | 52.5% | 54.6% | 50.5% |
| Male Population | 47.5% | 45.4% | 49.5% |
| Median Age | 70.2 | 26.8 | 38.4 |
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| Population - 2010 | 96 | 9,766 | 309,327,143 |
| Population - 2000 | 111 | 9,149 | 285,036,114 |
| Population - 1990 | 102 | 9,230 | 251,960,433 |
| Pop. 2000 to Now | -16.2% | -5.0% | 15.6% |
| Pop. 1990 to Now | -8.8% | -5.8% | 30.8% |
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| Population Density | 1.1 | 3,388.6 | 93.4 |
| Land Area | 73.3 | 2.5 | 3,531,905.4 |
| Water Area | 0.7 | 0.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Brown township (Lycoming County), PA | Lock Haven, PA | United States |
| Age 0 to 4 | 0.0% | 5.0% | 5.9% |
| Age 5 to 9 | 0.0% | 3.1% | 6.1% |
| Age 10 to 14 | 1.3% | 4.9% | 6.6% |
| Age 15 to 17 | 0.0% | 1.5% | 3.9% |
| Age 18 to 20 | 0.0% | 15.4% | 4.0% |
| Age 21 to 24 | 0.0% | 16.0% | 5.2% |
| Age 25 to 34 | 0.0% | 13.6% | 13.8% |
| Age 35 to 44 | 2.5% | 8.9% | 12.9% |
| Age 45 to 54 | 18.8% | 7.4% | 12.6% |
| Age 55 to 59 | 2.5% | 5.9% | 6.7% |
| Age 60 to 64 | 8.8% | 4.6% | 6.3% |
| Age 65 to 74 | 35.0% | 6.7% | 9.6% |
| Age 75 to 84 | 31.3% | 3.0% | 4.5% |
| Age 85 and over | 0.0% | 4.1% | 1.9% |
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| Race | | | |
| | Brown township (Lycoming County), PA | Lock Haven, PA | United States |
| White | 86.3% | 90.3% | 59.4% |
| Black | 0.0% | 3.0% | 12.2% |
| Asian | 0.0% | 1.4% | 5.6% |
| Native American | 0.0% | 1.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 13.8% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 1.7% | 3.2% |
| Hispanic | 0.0% | 2.6% | 18.4% |
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| Marriage & Family | | | |
| | Brown township (Lycoming County), PA | Lock Haven, PA | United States |
| Married Population | 86.1% | 32.3% | 49.8% |
| Currently Married | 86.1% | 31.5% | 48.0% |
| Married but Separated | 0.0% | 0.8% | 1.8% |
| Single Population | 13.9% | 67.7% | 50.2% |
| Never Married | 1.3% | 50.2% | 33.8% |
| Divorced | 11.4% | 10.5% | 10.8% |
| Widowed | 1.3% | 7.0% | 5.6% |
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| Household Size | 1.63 | 2.22 | 2.60 |
| Households | 49 | 3,298 | 124,010,992 |
| Family Households | 39 | 1,664 | 80,755,759 |
| Married couple, w/children | 5.1% | 20.9% | 30.5% |
| Married couple, no children | 94.9% | 37.5% | 42.9% |
| Non Family Households | 10 | 1,634 | 43,255,233 |
| Single householder, w/children | 0.0% | 33.4% | 15.8% |
| Single householder, no children | 0.0% | 8.3% | 10.8% |