Bethel Park (BE-thuhl PAHRK), borough (1990 pop. 33,823), Allegheny co., SW Pa., suburb 8 mi/12.9 km S of downtown Pittsburgh; 40°19'N 80°02'W. RR junction. Mfg. (tool and die, ventilation materials, machinery; diverse light mfg.). U.S. Bureau of Mines Experimental Mine to E; South Regional Park to E. Inc. 1949.