| | Phelps, WI | Arbor Vitae, WI | United States |
| Population | 1,238 | 3,380 | 329,725,481 |
| Female Population | 47.3% | 49.0% | 50.5% |
| Male Population | 52.7% | 51.0% | 49.5% |
| Median Age | 59.3 | 46.3 | 38.4 |
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| Population - 2010 | 1,207 | 3,325 | 309,327,143 |
| Population - 2000 | 1,350 | 3,153 | 285,036,114 |
| Population - 1990 | 1,187 | 2,531 | 251,960,433 |
| Pop. 2000 to Now | -4.4% | 9.5% | 15.6% |
| Pop. 1990 to Now | 8.8% | 36.4% | 30.8% |
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| Population Density | 13.2 | 54.7 | 93.4 |
| Land Area | 93.6 | 61.8 | 3,531,905.4 |
| Water Area | 15.0 | 9.5 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Phelps, WI | Arbor Vitae, WI | United States |
| Age 0 to 4 | 4.2% | 2.3% | 5.9% |
| Age 5 to 9 | 1.6% | 8.7% | 6.1% |
| Age 10 to 14 | 2.6% | 9.1% | 6.6% |
| Age 15 to 17 | 1.1% | 8.8% | 3.9% |
| Age 18 to 20 | 2.0% | 1.8% | 4.0% |
| Age 21 to 24 | 2.6% | 2.4% | 5.2% |
| Age 25 to 34 | 10.2% | 5.3% | 13.8% |
| Age 35 to 44 | 3.6% | 10.8% | 12.9% |
| Age 45 to 54 | 10.4% | 11.5% | 12.6% |
| Age 55 to 59 | 13.4% | 6.4% | 6.7% |
| Age 60 to 64 | 16.6% | 5.5% | 6.3% |
| Age 65 to 74 | 18.3% | 17.2% | 9.6% |
| Age 75 to 84 | 10.2% | 9.3% | 4.5% |
| Age 85 and over | 3.2% | 1.0% | 1.9% |
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| Race | | | |
| | Phelps, WI | Arbor Vitae, WI | United States |
| White | 93.5% | 93.3% | 59.4% |
| Black | 0.8% | 0.0% | 12.2% |
| Asian | 0.7% | 0.0% | 5.6% |
| Native American | 1.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.1% | 2.8% | 3.2% |
| Hispanic | 0.9% | 3.9% | 18.4% |
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| Marriage & Family | | | |
| | Phelps, WI | Arbor Vitae, WI | United States |
| Married Population | 62.9% | 54.0% | 49.8% |
| Currently Married | 62.9% | 53.1% | 48.0% |
| Married but Separated | 0.0% | 0.8% | 1.8% |
| Single Population | 37.1% | 46.0% | 50.2% |
| Never Married | 18.9% | 29.2% | 33.8% |
| Divorced | 11.0% | 8.7% | 10.8% |
| Widowed | 7.2% | 8.1% | 5.6% |
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| Household Size | 2.07 | 2.50 | 2.60 |
| Households | 578 | 1,351 | 124,010,992 |
| Family Households | 380 | 852 | 80,755,759 |
| Married couple, w/children | 12.9% | 32.6% | 30.5% |
| Married couple, no children | 73.9% | 50.0% | 42.9% |
| Non Family Households | 198 | 499 | 43,255,233 |
| Single householder, w/children | 8.4% | 12.1% | 15.8% |
| Single householder, no children | 4.7% | 5.3% | 10.8% |