Jefferson County, Arkansas

Jefferson County
County of Jefferson
The south façade of the Jefferson County Courthouse in Pine Bluff
Location within the U.S. state of Arkansas
Arkansas's location within the U.S.
Coordinates: 34°17′15″N 91°56′32″W / 34.28750°N 91.94222°W / 34.28750; -91.94222
Country United States
State Arkansas
EstablishedNovember 2, 1829 (1829-11-02)
Named afterThomas Jefferson
SeatPine Bluff
Largest cityPine Bluff
Other citiesAltheimer, Humphrey, Redfield, White Hall
Government
  County JudgeGerald Robinson (D)
Area
  Total
914 sq mi (2,370 km2)
  Land871 sq mi (2,260 km2)
  Water43 sq mi (110 km2)  4.7%
Population
 (2020)
  Total
67,260
  Estimate 
(2023)
63,661
  Density74/sq mi (28/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
ZIP Codes
71601–71603, 71644, 71659, 72004, 72046, 72073, 72079, 72132, 72150, 72152, 72160, 72168, 72175
Area code501, 870
Congressional district4th
Websitejeffersoncountyar.gov

Jefferson County, officially the County of Jefferson, is a county located in the U.S. state of Arkansas in the area known as the Arkansas Delta that extends west of the Mississippi River. Jefferson County consists of five cities, two towns, and 20 townships. It is bisected by the Arkansas River, which was critical to its development and long the chief transportation byway. In 2020, Jefferson County's population was estimated at 67,260. The county seat and largest city is Pine Bluff. The county is included in the Pine Bluff metropolitan statistical area. The county seat and the most populous city is Pine Bluff.

Jefferson County was formed from Vaugine Township, Pulaski County and Richland Township, Arkansas County in the Arkansas Territory on November 2, 1829. It is named for Thomas Jefferson, third U.S. president. It was the site of the Battle of Pine Bluff on October 25, 1863.