County · Arkansas

Union County

Union County is a county located on the central southern border of the U.S. state of Arkansas. As of the 2020 census, the population was 39,054. The county seat is El Dorado. The county was formed on November 2, 1829, and named in recognition of the citizens' petition for a new county, which said that they were petitioning "in the spirit of Union and Unity." The county is directly adjacent to the south to Union Parish in the state of Louisiana. The El Dorado, AR Micropolitan Statistical Area includes all of Union County.

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Quorum Court Primary
governing council

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Reference data (Census of Governments 2022)

Census ID (PID6): 160885
FIPS state: 05
FIPS county: 139
FIPS place: 99139
Census record name: COUNTY OF UNION
Mailing address: 2476 CHAMPAGNOLLE RD, EL DORADO 71730