Union County, Pennsylvania

Union County
County
Old Union County Courthouse in New Berlin
Location within the U.S. state of Pennsylvania
Pennsylvania's location within the U.S.
Coordinates: 40°58′N 77°04′W / 40.96°N 77.06°W / 40.96; -77.06
Country	United States
State	Pennsylvania
Founded	March 22, 1813
Seat	Lewisburg
Largest borough	Lewisburg
Area
• Total	318 sq mi (820 km2)
• Land	316 sq mi (820 km2)
• Water	1.8 sq mi (5 km2)  0.6%
Population  (2020)
• Total	42,681
• Density	142/sq mi (55/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional district	15th
Website	unionco.org

Union County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 42,681.^[1] Its county seat is Lewisburg.^[2] The county was created on March 22, 1813, from part of Northumberland County. Its name is an allusion to the federal Union. Mifflinburg was established by legislation as the first county seat until it was moved to New Berlin in 1815. Lewisburg became county seat in 1855 and has remained so since. Union County comprises the Lewisburg, PA Micropolitan Statistical Area, which is also included in the Bloomsburg-Berwick-Sunbury, PA Combined Statistical Area. The county is part of the Central Pennsylvania region of the state.^[a]

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