| | Arlington, OH | Arapahoe, NE | United States |
| Population | 1,698 | 1,004 | 329,725,481 |
| Female Population | 48.9% | 54.8% | 50.5% |
| Male Population | 51.1% | 45.2% | 49.5% |
| Median Age | 29.7 | 41.5 | 38.4 |
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| Population - 2010 | 1,463 | 1,025 | 309,327,143 |
| Population - 2000 | 1,351 | 1,028 | 285,036,114 |
| Population - 1990 | 1,267 | 1,001 | 251,960,433 |
| Pop. 2000 to Now | 5.9% | -4.8% | 15.6% |
| Pop. 1990 to Now | 12.9% | -2.2% | 30.8% |
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| Population Density | 2,111.9 | 1,017.2 | 93.4 |
| Land Area | 0.8 | 1.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Arlington, OH | Arapahoe, NE | United States |
| Age 0 to 4 | 11.0% | 9.6% | 5.9% |
| Age 5 to 9 | 14.1% | 10.5% | 6.1% |
| Age 10 to 14 | 5.8% | 3.5% | 6.6% |
| Age 15 to 17 | 3.6% | 5.4% | 3.9% |
| Age 18 to 20 | 2.6% | 2.0% | 4.0% |
| Age 21 to 24 | 1.9% | 2.3% | 5.2% |
| Age 25 to 34 | 16.3% | 7.9% | 13.8% |
| Age 35 to 44 | 14.5% | 12.4% | 12.9% |
| Age 45 to 54 | 6.8% | 8.6% | 12.6% |
| Age 55 to 59 | 4.7% | 7.4% | 6.7% |
| Age 60 to 64 | 6.2% | 12.8% | 6.3% |
| Age 65 to 74 | 4.8% | 10.0% | 9.6% |
| Age 75 to 84 | 3.2% | 3.3% | 4.5% |
| Age 85 and over | 4.5% | 4.6% | 1.9% |
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| Race | | | |
| | Arlington, OH | Arapahoe, NE | United States |
| White | 94.5% | 91.1% | 59.4% |
| Black | 1.5% | 0.0% | 12.2% |
| Asian | 0.0% | 0.6% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.9% | 1.2% | 3.2% |
| Hispanic | 3.1% | 6.9% | 18.4% |
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| Marriage & Family | | | |
| | Arlington, OH | Arapahoe, NE | United States |
| Married Population | 61.6% | 71.9% | 49.8% |
| Currently Married | 59.4% | 71.0% | 48.0% |
| Married but Separated | 2.1% | 0.9% | 1.8% |
| Single Population | 38.4% | 28.1% | 50.2% |
| Never Married | 18.2% | 15.2% | 33.8% |
| Divorced | 12.3% | 2.7% | 10.8% |
| Widowed | 7.9% | 10.2% | 5.6% |
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| Household Size | 2.86 | 2.60 | 2.60 |
| Households | 569 | 377 | 124,010,992 |
| Family Households | 433 | 289 | 80,755,759 |
| Married couple, w/children | 54.0% | 45.3% | 30.5% |
| Married couple, no children | 26.8% | 47.1% | 42.9% |
| Non Family Households | 136 | 88 | 43,255,233 |
| Single householder, w/children | 12.5% | 7.6% | 15.8% |
| Single householder, no children | 6.7% | 0.0% | 10.8% |