Palm Valley is a census-designated place (CDP) in St. Johns County, Florida, United States. The population was 19,860 at the 2000 census.
Palm Valley is located at 30°12′24″N 81°23′14″W / 30.20667°N 81.38722°W / 30.20667; -81.38722 (30.206580, -81.387256).
According to the United States Census Bureau, the CDP has a total area of 14.0 square miles (36 km), of which 13.4 square miles (35 km) is land and 0.6 square miles (1.6 km) (4.21%) is water.
The Palm Valley Bridge is a recent addition to the neighborhood.
As of the census of 2000, there were 19,860 people, 8,188 households, and 5,584 families residing in the CDP. The population density was 1,480.8 people per square mile (571.8/km²). There were 8,648 housing units at an average density of 644.8/sq mi (249.0/km²). The racial makeup of the CDP was 95.84% White, 1.25% African American, 0.17% Native American, 1.29% Asian, 0.03% Pacific Islander, 0.52% from other races, and 0.90% from two or more races. Hispanic or Latino of any race were 2.80% of the population.
There were 8,188 households out of which 33.2% had children under the age of 18 living with them, 59.2% were married couples living together, 7.1% had a female householder with no husband present, and 31.8% were non-families. 24.7% of all households were made up of individuals and 6.6% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 2.93.
In the CDP, the population was spread out with 25.0% under the age of 18, 5.5% from 18 to 24, 30.6% from 25 to 44, 26.8% from 45 to 64, and 12.1% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 94.3 males. For every 100 females age 18 and over, there were 90.6 males.
The median income for a household in the CDP was $68,200, and the median income for a family was $87,847 (these figures had risen to $84,276 and $112,317 respectively as of a 2007 estimate). Males had a median income of $58,152 versus $34,738 for females. The per capita income for the CDP was $42,747. About 2.4% of families and 3.5% of the population were below the poverty line, including 3.0% of those under age 18 and 2.7% of those age 65 or over.