 Rostraver Township has eight land borders, including Elizabeth Township in Allegheny County to the north, West Newton to the northwest, Perry and Washington Townships in Fayette County to the south, North Belle Vernon and Belle Vernon (the latter in Fayette County) to the southwest, Monessen to the west-southwest, and Forward Township in Allegheny County to the northwest.Across the Monongahela River to the west, Rostraver runs adjacent with six Washington County neighborhoods, including (from north to south)