United States Government--u S Marine Corps, West Pittsburgh Ofc 13 E West Dr Pittsburgh, PA 15237 Phone : (724) 535-7222 Business Category Government Offices-Federal Business Consulting Services National Security Recruiting Us Armed Forces Government Offices & Public Schools United States Government--u S Postal Service, Postal Wampum Area, Postal West Pittsburgh Ofc 13 & Center Wampum, PA 16157 Phone : (724) 535-7222 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - West Pittsburg 341 Center Ave West Pittsburg, PA 16160 Phone : (724) 535-7222 Business Category Post Offices Toll-Free           (800) ASK-USPS