where is new castle pa
CALL 724.656.3568. Welcome to the City of New Castle, Pennsylvania, a National Safety Council Safe Community. New Castle is located in the northwest section of western Pennsylvania, approximately 90 miles south of Erie and 50 miles northwest of Pittsburgh. New Castle is the county seat for Lawrence County with a population under 24,000. We pride ourselves as being a friendly, family oriented community with access to great healthcare and a highly rated school system. The City has the third largest historical district in Pennsylvania.