As of the 2000 Census, Port St John had a total population of 12,112 - 6,087 (50.30 percent) females and 6,025 (49.7 percent) males. The median age was 37.10 years. Twenty-eight point one zero percent (28.10%) of the population was under 18 years and 11.20 percent was 65 years and older.
For people reporting one race alone;
Note: People of Hispanic origin may be of any race.
As of the 2000 Census, Port St John had a total of 4,551 housing units, 5.20 percent of which were vacant. Of the total housing units, 88.86 percent were in single-unit structures, 8.81 percent were in multi-unit structures, and 2.30 percent were mobile homes. Twenty-six point three seven percent (26.37%) of the housing units in Port St John were built since 1990.
As of the 2000 Census, Port St John had 4,307 occupied housing units - 3,738 (86.80 percent) owner occupied and 569 (13.20 percent) renter occupied. Point four zero percent (0.40%) of the households did not have telephone service and 1.20 percent of the households did not have access to a car, truck, or van for private use. Multi-Vehicle households were not rare; 66.45 percent had two vehicles and another 19.00 percent had three or more.
The median monthly housing costs for mortgaged owners was $803, nonmortgaged owners $225, and renters $707. Twenty-five point zero four percent (25.04%) of owners with mortgages, and 33.28 percent of renters in Port St John spent 30 percent or more of household income on housing.
As of the 2000 Census there were 12,112 people comprising 4,307 households in Port St John. The average household size was 2.73 people.
Families made up 75.80 percent of the households in Port St John. This figure includes both married-couple families (60.10 percent) and other families (15.70 percent). Nonfamily households made up 24.20 percent of all households in Port St John. Most of the nonfamily households were people living alone, but some were composed of people living in households in which no one was related to the householder.
Two point eight zero percent (2.80%) of the people living in Port St John as of the 2000 Census there were foreign born. Ninety-five point five zero percent (95.50%) were native, including 35.90 percent who were born in Florida.
Among people at least five years old living in Port St John as of the 2000 Census, 5.00 percent spoke a language other than English at home. Of those speaking a language other than English at home, 2.00 percent spoke Spanish and 3.00 percent spoke some other language; 1.60 percent reported that they did not speak English "very well."
As of the 2000 Census, 62.00 percent of the people at least five years old living in Port St John were living in the same residence in 1995; 21.30 percent had moved during the past 5 years from another residence in Brevard County, 5.30 percent from another county in Florida, 10.40 percent from another state, and less than 1.00 percent from abroad.
As of the 2000 Census, 88.40 percent of people 25 years and over in Port St John had at least graduated from high school and 15.10 percent had a bachelor’s degree or higher. Eight point four zero percent (8.40%) were dropouts; they were not enrolled in school and had not graduated from high school.
The total school enrollment in Port St John was 3,611 as of the 2000 Census. Nursery school and kindergarten enrollment was 561 children and elementary or high school enrollment was 2,346 children. College or graduate school enrollment was 704 people.
In Port St John, among people at least five years old as of the 2000 Census, 18.59 percent reported a disability. The likelihood of having a disability varied by age - from 10.90 percent of people 5 to 20 years old, to 20.00 percent of people 21 to 64 years old, and to 40.50 percent of those 65 and older.
As of the 2000 Census, for the employed population 16 years and older, the leading industries in Port St John were Educational, Health And Social Services, 15.90 percent, and Retail Trade at 14.10 percent.
The most common occupations reported in Port St John, Florida were:
Seventy point four zero percent (70.40%) of the people employed were Private wage and salary workers; 24.60 percent were Federal, state, or local government workers; and 5.00 percent were Self-employed in own not incorporated business.
Eighty-six point eight zero percent (86.80%) of Port St John workers drove to work alone as of the 2000 Census, 10.20 percent carpooled, 0.10 percent took public transportation, and 0.80 percent used other means. The remaining 1.40 percent worked at home. Among those who commuted to work, it took them on average 27 minutes to get to work.
The median income of households in Port St John was $44,030. Eighty-five point zero zero percent (85.00%) of Port St John households received earnings and 16.60 percent received retirement income other than Social Security. Twenty-two point six zero percent (22.60%) of Port St John households received Social Security. The average income from Social Security was $12,691. These income sources are not mutually exclusive; that is, some households received income from more than one source.
As of the 2000 Census, 6.60 percent of Port St John residents were in poverty. Seven point nine zero percent (7.90%) of related children under 18 were below the poverty level, compared with 6.00 percent of people 65 years old and over. Four point seven zero percent (4.70%) of all Port St John families and 14.50 percent of families with a female householder and no husband present had incomes below the poverty level.