PA 980 begins at PA 519 in North Strabane Township. From there, the route runs northbound through the borough of Canonsburg, intersecting with Morganza Road which provides access to Exit 45 of I-79. PA 980 then turns northwest into Cecil Township, where it passes under the PA 576 toll road, and continues through the borough of McDonald and Robinson Township. In Robinson Township, Fort Cherry Road and Beech Hollow Road head west to provide access to the PA 576 toll road. Entering Allegheny County, the last 0.2 mile of PA 980 runs through North Fayette Township from the county line to its northern terminus at US 22.
PA 980 was signed in 1928. However, it wasn't until 1932 until it was paved from Imperial to Carnot. In 1936, the route was moved from Imperial to Carnot, to its current location. That route is now currently PA 978. In 1951, its northern terminus was moved from US 30, the Lincoln Highway in Clinton to the William Penn Highway. In 1965, its northern terminus was moved from the William Penn Highway to its current location at the junction with US 22.
PA 519 in North Strabane
PA 50 in Cecil Township
US 22 in North Fayette Township
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