| | Farmersville, OH | Arcanum, OH | United States |
| Population | 1,039 | 2,661 | 329,725,481 |
| Female Population | 47.5% | 50.4% | 50.5% |
| Male Population | 52.6% | 49.6% | 49.5% |
| Median Age | 33.5 | 36.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,009 | 2,114 | 309,327,143 |
| Population - 2000 | 980 | 2,076 | 285,036,114 |
| Population - 1990 | 932 | 1,953 | 251,960,433 |
| Pop. 2000 to Now | 2.6% | -3.5% | 15.6% |
| Pop. 1990 to Now | 7.8% | 2.6% | 30.8% |
| space4 | | | |
| Population Density | 1,453.2 | 2,092.0 | 93.4 |
| Land Area | 0.7 | 1.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Farmersville, OH | Arcanum, OH | United States |
| Age 0 to 4 | 5.4% | 6.3% | 5.9% |
| Age 5 to 9 | 10.7% | 7.7% | 6.1% |
| Age 10 to 14 | 10.8% | 7.7% | 6.6% |
| Age 15 to 17 | 4.6% | 4.1% | 3.9% |
| Age 18 to 20 | 2.8% | 5.2% | 4.0% |
| Age 21 to 24 | 3.4% | 3.3% | 5.2% |
| Age 25 to 34 | 14.7% | 13.9% | 13.8% |
| Age 35 to 44 | 10.7% | 13.6% | 12.9% |
| Age 45 to 54 | 13.2% | 10.9% | 12.6% |
| Age 55 to 59 | 4.6% | 6.2% | 6.7% |
| Age 60 to 64 | 6.6% | 3.8% | 6.3% |
| Age 65 to 74 | 8.3% | 8.8% | 9.6% |
| Age 75 to 84 | 3.5% | 6.7% | 4.5% |
| Age 85 and over | 0.8% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Farmersville, OH | Arcanum, OH | United States |
| White | 99.2% | 92.5% | 59.4% |
| Black | 0.0% | 2.3% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.0% | 0.4% |
| Two or More Races | 0.3% | 3.6% | 3.2% |
| Hispanic | 0.2% | 1.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Farmersville, OH | Arcanum, OH | United States |
| Married Population | 63.7% | 58.5% | 49.8% |
| Currently Married | 63.2% | 56.9% | 48.0% |
| Married but Separated | 0.5% | 1.5% | 1.8% |
| Single Population | 36.3% | 41.5% | 50.2% |
| Never Married | 22.4% | 26.2% | 33.8% |
| Divorced | 9.3% | 9.6% | 10.8% |
| Widowed | 4.6% | 5.8% | 5.6% |
| space5 | | | |
| Household Size | 2.92 | 2.53 | 2.60 |
| Households | 356 | 1,053 | 124,010,992 |
| Family Households | 294 | 771 | 80,755,759 |
| Married couple, w/children | 41.8% | 27.8% | 30.5% |
| Married couple, no children | 39.5% | 47.6% | 42.9% |
| Non Family Households | 62 | 282 | 43,255,233 |
| Single householder, w/children | 11.2% | 16.1% | 15.8% |
| Single householder, no children | 7.5% | 8.6% | 10.8% |