Loop is an unincorporated place and former town in West Mahoning Township, Indiana County, Pennsylvania. It is situated at a loop in the meandering Mahoning Creek. Lysander Barrett settled in the area around 1842; an iron furnace was erected in 1847. Before its eventual abandonment, the town had a post office, a schoolhouse, and a stop on the Buffalo, Rochester and Pittsburgh Railway.
- U.S. Geological Survey Geographic Names Information System: Loop Retrieved 1 July 2017.
- Graff, Bill (16 May 1998). "Grafton, railroads and The Loop". The Indiana Gazette. Indiana, PA. p. 2.
- "PastFinder Presents: Those Old Photos". The Indiana Gazette. Indiana, PA. 21 April 2012. p. 4.
- "Camera Reflections: Those Old Photographs". Indiana Evening Gazette. Indiana, PA. 16 November 1974. p. 12.
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