| | Union, OR | La Pine, OR | United States |
| Population | 1,927 | 2,390 | 329,725,481 |
| Female Population | 49.7% | 48.8% | 50.5% |
| Male Population | 50.3% | 51.2% | 49.5% |
| Median Age | 42.1 | 49.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,113 | 1,657 | 309,327,143 |
| Population - 2000 | 1,926 | 5,799 | 285,036,114 |
| Population - 1990 | 1,847 | 761 | 251,960,433 |
| Pop. 2000 to Now | 14.6% | -66.2% | 15.6% |
| Pop. 1990 to Now | 19.5% | 157.6% | 30.8% |
| space4 | | | |
| Population Density | 774.2 | 343.2 | 93.4 |
| Land Area | 2.5 | 7.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Union, OR | La Pine, OR | United States |
| Age 0 to 4 | 7.3% | 4.6% | 5.9% |
| Age 5 to 9 | 4.7% | 6.2% | 6.1% |
| Age 10 to 14 | 3.6% | 2.8% | 6.6% |
| Age 15 to 17 | 2.1% | 4.8% | 3.9% |
| Age 18 to 20 | 4.5% | 2.4% | 4.0% |
| Age 21 to 24 | 6.2% | 7.0% | 5.2% |
| Age 25 to 34 | 14.1% | 8.7% | 13.8% |
| Age 35 to 44 | 12.1% | 9.2% | 12.9% |
| Age 45 to 54 | 11.1% | 15.0% | 12.6% |
| Age 55 to 59 | 4.4% | 11.1% | 6.7% |
| Age 60 to 64 | 8.9% | 8.6% | 6.3% |
| Age 65 to 74 | 9.2% | 11.3% | 9.6% |
| Age 75 to 84 | 7.5% | 5.9% | 4.5% |
| Age 85 and over | 4.4% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Union, OR | La Pine, OR | United States |
| White | 88.8% | 79.4% | 59.4% |
| Black | 3.3% | 0.0% | 12.2% |
| Asian | 1.7% | 0.0% | 5.6% |
| Native American | 1.4% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 3.6% | 0.2% |
| Other | 0.4% | 0.0% | 0.4% |
| Two or More Races | 2.7% | 1.1% | 3.2% |
| Hispanic | 1.7% | 15.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Union, OR | La Pine, OR | United States |
| Married Population | 53.6% | 41.7% | 49.8% |
| Currently Married | 51.9% | 38.6% | 48.0% |
| Married but Separated | 1.7% | 3.1% | 1.8% |
| Single Population | 46.4% | 58.3% | 50.2% |
| Never Married | 26.3% | 33.8% | 33.8% |
| Divorced | 12.2% | 17.2% | 10.8% |
| Widowed | 7.9% | 7.3% | 5.6% |
| space5 | | | |
| Household Size | 2.28 | 2.59 | 2.60 |
| Households | 842 | 911 | 124,010,992 |
| Family Households | 515 | 616 | 80,755,759 |
| Married couple, w/children | 24.5% | 14.9% | 30.5% |
| Married couple, no children | 55.3% | 45.6% | 42.9% |
| Non Family Households | 327 | 295 | 43,255,233 |
| Single householder, w/children | 9.7% | 19.6% | 15.8% |
| Single householder, no children | 10.5% | 19.8% | 10.8% |