The crossword solution for the term 'PORT IN THE KEYSTONE STATE' is 'ERIE'. Erie is a city located in northwestern Pennsylvania, and is the fourth-largest city in the state. It is situated on the south shore of Lake Erie, and is the principal city of the Erie Metropolitan Statistical Area. Erie is known as the 'Gem City' due to its beautiful lakefront location and its many attractions. It is also home to the Port of Erie, which is a major port for shipping and transportation.