| Capital: | Lewisburg |
|---|---|
| Origen y Formación del condado: | Parts of Northumberland County. |
| Población: | 44,947 habitantes |
| Área: | 317 sq mi |
| Localización del condado dentro de Pennsylvania: |
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Localidades en Union, Pennsylvania
- Allenwood
- Buffalo Township Union County
- East Buffalo Township
- Gregg Township Union County
- Hartleton
- Hartley Township
- Kelly Township
- Laurelton
- Lewisburg
- Lewis Township Union County
- Limestone Township Union County
- Linntown
- Mifflinburg
- Millmont
- New Berlin
- New Columbia
- Swengel
- Union Township Union County
- Vicksburg
- Weikert
- West Buffalo Township
- West Milton
- White Deer Township
- Winfield