ST. JOHNS COUNTY
According to the U.S. Census Bureau, the county has a total area of 2,127 km² (821 mi²). 1,577 km² (609 mi²) of it is land and 550 km² (212 mi²) of it is water, much of it in
the Atlantic Ocean. The total area is 25.86% water.
The St. Johns County Commission is an elected five-member commission,
which appoints a county administrator. The main environmental and agricultural body is the St. Johns County Soil and Water Conservation District, which works closely with other area agencies.
As of the census² of 2000, there were 123,135 people, 49,614 households, and 34,084 families residing in the county. The population density was 78/km² (202/mi²). There were 58,008 housing units at an average density of 37/km² (95/mi²).
The racial makeup of the county was 90.92% White, 6.29% African American, 0.26% American Indian, 0.95% Asian, 0.05% Pacific Islander, 0.55% from other races, and 0.97% from two or more races. Hispanic or Latino of any race were 2.63% of the population.
There were 49,614 households
out of which 29.20% had children under the age of 18 living with them, 56.80% were married couples living together, 8.90% had a female householder with no husband present, and 31.30% were non-families. 24.30%
of all households were made up of individuals and 9.40% had someone living alone who was 65 years of age or older. The average
household size was 2.44 and the average family size was 2.90.
In the county the population
was spread out with 23.10% under the age of 18, 7.00% from 18 to 24, 27.60% from 25 to 44, 26.40% from 45 to 64, and 15.90%
who were 65 years of age or older. The median age was 41 years. For every 100 females there were 94.50 males. For every 100
females age 18 and over, there were 91.50 males.
The median income for a household in the county
was $50,099, and the median income for a family was $59,153. Males had a median income of $40,783 versus $27,240 for females.
The per capita income for the county was $28,674. About 5.10% of families and 8.00% of the population were below the poverty line, including 9.30% of those under age 18 and 6.20% of those age 65 or over.