| | Shirley, ME | Jay, ME | United States |
| Population | 174 | 4,661 | 329,725,481 |
| Female Population | 43.1% | 47.2% | 50.5% |
| Male Population | 56.9% | 52.8% | 49.5% |
| Median Age | 48.4 | 41 | 38.4 |
| space3 | | | |
| Population - 2010 | 233 | 4,838 | 309,327,143 |
| Population - 2000 | 183 | 4,985 | 285,036,114 |
| Population - 1990 | 271 | 5,080 | 251,960,433 |
| Pop. 2000 to Now | 25.1% | -7.8% | 15.6% |
| Pop. 1990 to Now | -15.5% | -9.5% | 30.8% |
| space4 | | | |
| Population Density | 3.3 | 96.3 | 93.4 |
| Land Area | 53.3 | 48.4 | 3,531,905.4 |
| Water Area | 0.8 | 0.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Shirley, ME | Jay, ME | United States |
| Age 0 to 4 | 4.6% | 2.1% | 5.9% |
| Age 5 to 9 | 4.6% | 5.5% | 6.1% |
| Age 10 to 14 | 1.1% | 6.2% | 6.6% |
| Age 15 to 17 | 1.1% | 3.1% | 3.9% |
| Age 18 to 20 | 6.3% | 1.4% | 4.0% |
| Age 21 to 24 | 4.0% | 4.9% | 5.2% |
| Age 25 to 34 | 5.7% | 14.5% | 13.8% |
| Age 35 to 44 | 19.0% | 14.5% | 12.9% |
| Age 45 to 54 | 13.2% | 15.3% | 12.6% |
| Age 55 to 59 | 2.9% | 4.4% | 6.7% |
| Age 60 to 64 | 7.5% | 7.0% | 6.3% |
| Age 65 to 74 | 24.1% | 12.1% | 9.6% |
| Age 75 to 84 | 3.4% | 8.5% | 4.5% |
| Age 85 and over | 2.3% | 0.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Shirley, ME | Jay, ME | United States |
| White | 80.5% | 94.1% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 1.7% | 0.9% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 2.9% | 0.0% | 0.4% |
| Two or More Races | 12.1% | 3.5% | 3.2% |
| Hispanic | 2.9% | 1.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Shirley, ME | Jay, ME | United States |
| Married Population | 43.6% | 52.2% | 49.8% |
| Currently Married | 43.6% | 52.2% | 48.0% |
| Married but Separated | 0.0% | 0.0% | 1.8% |
| Single Population | 56.4% | 47.8% | 50.2% |
| Never Married | 44.2% | 19.9% | 33.8% |
| Divorced | 9.0% | 19.2% | 10.8% |
| Widowed | 3.2% | 8.6% | 5.6% |
| space5 | | | |
| Household Size | 2.41 | 2.42 | 2.60 |
| Households | 66 | 1,928 | 124,010,992 |
| Family Households | 44 | 1,190 | 80,755,759 |
| Married couple, w/children | 6.8% | 22.0% | 30.5% |
| Married couple, no children | 63.6% | 49.8% | 42.9% |
| Non Family Households | 22 | 738 | 43,255,233 |
| Single householder, w/children | 9.1% | 17.5% | 15.8% |
| Single householder, no children | 20.5% | 10.7% | 10.8% |