City of Sebastian, Florida: General Information

Sebastian, Florida is a city in Indian River County, in the Treasure Coast region along the Atlantic Ocean.  According to the 2000 U.S. Census, the population was 16,181, and as of 2004, the population recorded by the U.S. Census Bureau is estimated to be 18,671.  Sebastian is one of the principal cities within the Sebastian–Vero Beach Metropolitan Statistical Area for U.S. Census purposes.  The MSA includes all of Indian River County.

The 2000 U.S. Census also recorded that there were 6,844 households, and 5,044 families residing in Sebastian.  The population density, or number of inhabitants per square mile was 1,282.2.  The 2010  U.S. Census Bureau recorded the population of Sebastian at 22,371 inhabitants.  Also calculated in the 2010 U.S. Census is that there were 7,287 housing units at an average density of 577.4 per square mile, an increase over 2000 figures.

Of the 6,844 households, 24.5% had children under the age of 18 as inhabitants, while 61.5% were married couples living together, and 9.2% had a female householder with no husband present.  The remaining 26.3% were comprised of non-traditional families or unrelated individuals.  Other statistics within households showed that 21.6% were made up of individuals and 12.2% had someone living alone who was 65 years of age or older.  The average household size was 2.36 persons and the average family size was 2.72.

In Sebastian, the population was distributed among a range of age groups, with 20.2% being under the age of 18, 4.8% were 18 to 24 years old, 22.4% were aged from 25 to 44 years.  Among the older age groups, 24.7% ranged from 45 to 64, and 27.9% of the population was people who were 65 years of age or older. The median age in Sebastian as calculated by the 201 Census was 47 years. For every 100 females living in Sebastian there were 92.1 males, but for every 100 females age 18 and over, there were 88.8 males.