| | Sea Ranch, CA | Santa Ynez, CA | United States |
| Population | 1,078 | 4,679 | 329,725,481 |
| Female Population | 52.8% | 48.5% | 50.5% |
| Male Population | 47.2% | 51.6% | 49.5% |
| Median Age | 67.3 | 50.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 801 | 4,862 | 309,327,143 |
| Population - 2000 | 1,175 | 4,584 | 285,036,114 |
| Population - 1990 | 899 | 4,200 | 251,960,433 |
| Pop. 2000 to Now | -5.3% | -3.9% | 15.6% |
| Pop. 1990 to Now | 23.8% | 4.9% | 30.8% |
| space4 | | | |
| Population Density | 66.8 | 911.0 | 93.4 |
| Land Area | 16.1 | 5.1 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sea Ranch, CA | Santa Ynez, CA | United States |
| Age 0 to 4 | 1.3% | 0.5% | 5.9% |
| Age 5 to 9 | 1.1% | 6.2% | 6.1% |
| Age 10 to 14 | 4.8% | 8.6% | 6.6% |
| Age 15 to 17 | 0.0% | 3.5% | 3.9% |
| Age 18 to 20 | 0.0% | 5.6% | 4.0% |
| Age 21 to 24 | 0.0% | 3.5% | 5.2% |
| Age 25 to 34 | 1.4% | 5.9% | 13.8% |
| Age 35 to 44 | 4.1% | 11.8% | 12.9% |
| Age 45 to 54 | 6.0% | 15.2% | 12.6% |
| Age 55 to 59 | 7.6% | 6.2% | 6.7% |
| Age 60 to 64 | 13.8% | 10.2% | 6.3% |
| Age 65 to 74 | 35.4% | 13.2% | 9.6% |
| Age 75 to 84 | 18.6% | 7.3% | 4.5% |
| Age 85 and over | 5.8% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sea Ranch, CA | Santa Ynez, CA | United States |
| White | 80.6% | 69.8% | 59.4% |
| Black | 0.0% | 0.4% | 12.2% |
| Asian | 3.6% | 1.9% | 5.6% |
| Native American | 0.0% | 5.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.2% | 1.9% | 3.2% |
| Hispanic | 11.6% | 20.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sea Ranch, CA | Santa Ynez, CA | United States |
| Married Population | 66.6% | 58.0% | 49.8% |
| Currently Married | 66.6% | 58.0% | 48.0% |
| Married but Separated | 0.0% | 0.0% | 1.8% |
| Single Population | 33.4% | 42.0% | 50.2% |
| Never Married | 4.8% | 26.1% | 33.8% |
| Divorced | 15.0% | 9.8% | 10.8% |
| Widowed | 13.6% | 6.1% | 5.6% |
| space5 | | | |
| Household Size | 1.85 | 2.59 | 2.60 |
| Households | 583 | 1,806 | 124,010,992 |
| Family Households | 351 | 1,227 | 80,755,759 |
| Married couple, w/children | 3.1% | 31.4% | 30.5% |
| Married couple, no children | 86.9% | 53.6% | 42.9% |
| Non Family Households | 232 | 579 | 43,255,233 |
| Single householder, w/children | 7.7% | 8.8% | 15.8% |
| Single householder, no children | 2.3% | 6.2% | 10.8% |