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Union County, Florida facts for kids

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Union County, Florida
Map of Florida highlighting Union County
Location in the state of Florida
Map of the USA highlighting Florida
Florida's location in the U.S.
Founded May 20, 1921
Seat Lake Butler
Largest City Lake Butler
 - Total
 - Land
 - Water

250 sq mi (647 km²)
244 sq mi (632 km²)
6.2 sq mi (16 km²), 2.5%
 - (2015)
 - Density

64/sq mi (25/km²)
Time zone Eastern: UTC-5/-4

Union County is a county located in the state of Florida, the smallest in the state. As of the 2010 census, the population was 15,535. The county seat is Lake Butler.


Union County was created in 1921 from part of Bradford County. It was named to honor the concept of unity. Union County is the location of Union Correctional Institution and the Reception and Medical Center (RMC). Union CI is a maximum security prison and is home to part of Florida's Death Row. The death chamber is located at nearby Florida State Prison (FSP). Florida State Prison also houses some death-row inmates.


According to the U.S. Census Bureau, the county has a total area of 250 square miles (650 km2), of which 244 square miles (630 km2) is land and 6.2 square miles (16 km2) (2.5%) is water. It is the smallest county by area in Florida.

Adjacent counties


Historical population
Census Pop.
1930 7,428
1940 7,094 −4.5%
1950 8,906 25.5%
1960 6,043 −32.1%
1970 8,112 34.2%
1980 10,166 25.3%
1990 10,252 0.8%
2000 13,442 31.1%
2010 15,535 15.6%
Est. 2015 15,234 −1.9%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2015

At the 2000 census, there were 13,442 people, 3,367 households and 2,606 families residing in the county. The population density was 56 per square mile (22/km²). There were 3,736 housing units at an average density of 16 per square mile (6/km²). The racial makeup of the county was 73.62% White, 22.84% Black or African American, 0.66% Native American, 0.31% Asian, 0.02% Pacific Islander, 1.04% from other races, and 1.50% from two or more races. 3.55% of the population were Hispanic or Latino of any race.

Of the 3,367 households, 41.80% had children under the age of 18 living with them, 57.70% were married couples living together, 15.00% had a female householder with no husband present, and 22.60% were non-families. 19.50% of all households were made up of individuals and 7.10% had someone living alone who was 65 years of age or older. The average household size was 2.76 and the average family size was 3.13.

The age distribution was 21.80% under the age of 18, 8.70% from 18 to 24, 39.80% from 25 to 44, 22.20% from 45 to 64, and 7.50% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 183.00 males. For every 100 females age 18 and over, there were 215.20 males. This extremely skewed gender distribution is the result of the male prison population in the county.

The median household income was $34,563, and the median family income was $37,516. Males had a median income of $28,571 versus $22,083 for females. The per capita income for the county was $12,333. About 10.50% of families and 14.00% of the population were below the poverty line, including 14.60% of those under age 18 and 16.20% of those age 65 or over.




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