Formed March 22, 1813 (49th county)
Union County (42,675), Lewisburg (5,158)
The red brick Greek Revival structure was erected in 1855. The facility is on 2nd Street at St. Louis Street. Pennsylvania State Highway 45 is two blocks north of the site. Lewis Palmer is the building designer. The structure was enlarged in 1973. An 1815 courthouse was in New Berlin. The county was organized on March 22, 1813 from Northumberland County as the 49th county. Mifflinburg (1813), New Berlin (1815), and Lewisburg (1855) have all served as the county seat. Union County is named for the union of states. The county seat is named for settler Lewis Doerr.
Union County government consists of a sheriff and 3 Commissioners. Four Common Pleas Court Judges and Two Magistrate Court Judges serve Union and Snyder counties. Union County is in the central part of the state. Harrisburg, Pennsylvania is south and Philadelphia, Pennsylvania is southeast of the county. The county center is 10.4 miles West of Lewisburg nearer Forest Hill. The county is surrounded clockwise by Lycoming, Northumberland, Snyder, Mifflin, Centre, and Clinton counties.
The area of the county is 317 square miles. It is 64 out of 67 in the state. It ranks 50 out of 67 in population in the state. It has a density of 134.6 persons per square mile making it 35 out of 67 in the state. Union County has 22.7% of its population in its incorporated areas. Interstate Highway 80 passes east to west in the county from Northumberland County to Clinton County. United States Highway 15 enters from the north, Lycoming County, and exits to the south, Snyder County. Union County resembles a space shuttle. Lewisburg is located on the eastern border of the county. Lewisburg is the county seat and the largest city. It is 12.1% of the county population. This county is in the Lewisburg Micropolitan Statistical Area.
Hartleton
Lewisburg
Mifflinburg
New Berlin