Monessen, PA is a city in southwestern Pennsylvania, south of Pittsburgh. Located in Westmoreland County, Monessen is near Round Hill Park. Serviced by Monessen City School District and located close to Interstate 70, Monessen provides a wonderful living situation ideal for your needs. Monessen has By George for a good meal and Shoppes at Rostraver is close by for shopping. Need some time outdoors? Monessen City Park is in town and offers a walking track and an amphitheater to get some fresh air. Established in 1921, Monessen has much to offer.