Pennsylvania Route 995 (PA 995) is a 19-mile-long (31 km) north–south state route in south central Pennsylvania. The southern terminus of the route is at Pennsylvania Route 75 four miles (6 km) south of Mercersburg and three miles (5 km) north of the Mason-Dixon Line with Maryland. The northern terminus is at U.S. Route 30 one mile (1.6 km) west of Chambersburg. The road carries the names Welsh Run Road, Lemar Road, and Warm Spring Road.

PA 995 begins at an intersection with PA 75 in the community of Claylick in Montgomery Township, heading east-southeast on two-lane undivided Welsh Run Road. The road heads into open farmland, making a turn to the northeast and crossing PA 416 in the community of Welsh Run. The route crosses the West Branch Conococheague Creek and continues through more agricultural areas, coming to a junction with PA 16. At this point, PA 995 turns east to from a concurrency with PA 16 on Buchanan Trail, crossing into Peters Township. In the residential community of Upton, PA 995 splits from PA 16 by turning northwest onto Lemar Road, heading through more farmland. The route turns north onto Warm Springs Road and passes more agricultural surroundings before heading into wooded areas. The road enters St. Thomas Township and passes through the residential community of Williamson before turning northeast into farmland with some woods and homes. PA 995 crosses the Back Creek and continues east through more rural areas, crossing into Hamilton Township. The road turns northeast as it passes through Cashtown and Housum. The route continues through agricultural areas with some homes as it continues north through Turkeyfoot. Farther north, PA 995 enters increasing areas of rural residential development in the community of Sunbeam. The route passes more residential areas with some farms, passing through Pleasant View before ending at US 30.

The road was signed in 1928 and paved in 1932. In 1936, the southern terminus was moved from Upton to Claylick.

The entire route is in Franklin County.