Location in Indian River County and the state of Florida
|• Total||5.4 sq mi (14 km2)|
|• Land||5.3 sq mi (13.7 km2)|
|• Water||0.1 sq mi (0.3 km2)|
|Elevation||23 ft (7 m)|
|• Density||706.1/sq mi (272.4/km2)|
|Time zone||Eastern (EST) (UTC-5)|
|• Summer (DST)||EDT (UTC-4)|
|GNIS feature ID||0282414|
Fellsmere is a city in Indian River County, Florida, United States. The population was 3,813 at the 2000 census. As of 2013, the population recorded by the U.S. Census Bureau is 5,338. It is home of the Fellsmere Frog Leg Festival and The National Elephant Center.
Fellsmere is located at .
According to the United States Census Bureau, the city has a total area of 14.0 km² (5.4 mi²). 13.7 km² (5.3 mi²) of it is land and 0.3 km² (0.1 mi²) of it (1.85%) is water.
As of the census of 2000, there were 3,813 people, 865 households, and 718 families residing in the city. The population density was 277.8/km² (719.1/mi²). There were 918 housing units at an average density of 66.9/km² (173.1/mi²). The racial makeup of the city was 60.11% White, 6.69% African American, 0.47% Native American, 0.10% Asian, 0.05% Pacific Islander, 30.68% from other races, and 1.89% from two or more races. Hispanic or Latino of any race were 70.0% of the population.
There were 865 households out of which 52.6% had children under the age of 18 living with them, 66.6% were married couples living together, 8.7% had a female householder with no husband present, and 16.9% were non-families. 12.0% of all households were made up of individuals and 5.0% had someone living alone who was 65 years of age or older. The average household size was 3.94 and the average family size was 4.18.
In the city the population was spread out with 33.3% under the age of 18, 15.4% from 18 to 24, 32.8% from 25 to 44, 13.0% from 45 to 64, and 5.5% who were 65 years of age or older. The median age was 26 years. For every 100 females there were 139.5 males. For every 100 females age 18 and over, there were 149.8 males.
The median income for a household in the city was $30,395, and the median income for a family was $31,318. Males had a median income of $19,195 versus $15,521 for females. The per capita income for the city was $10,258. About 21.7% of families and 24.3% of the population were below the poverty line, including 25.2% of those under age 18 and 12.9% of those age 65 or over.
Fellsmere is a relatively short distance from the larger city of Sebastian, Florida. Because of this, very few large chain businesses are present. However, because many Fellsmere residents rely on foot, bicycle or public transport, small niche businesses thrive. These include restaurants, ethnic food, architectural salvage, gifts, guitar and motorized vehicle repair establishments.
Fellesmere is served by the #10 bus route of GoBus Lines, providing service to the North County Transit Hub. 
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2015". Retrieved July 2, 2016.
- "Census of Population and Housing". Census.gov. Retrieved June 4, 2015.