Moyamensing is an area of Philadelphia established as a Moyamensing Township during British colonial rule on the fast land of the Neck, lying between Passyunk and Wicaco. It was incorporated into Philadelphia County, Pennsylvania, United States and today encompasses several neighborhoods along the Moyamensing Avenue corridor in the Sout…Moyamensing is an area of Philadelphia established as a Moyamensing Township during British colonial rule on the fast land of the Neck, lying between Passyunk and Wicaco. It was incorporated into Philadelphia County, Pennsylvania, United States and today encompasses several neighborhoods along the Moyamensing Avenue corridor in the South Philadelphia section of Philadelphia.