The PEIR mainline from Georgetown extended through Montague Junction (where a spur was built to service nearby Montague) to Mount Stewart and on to Royalty Junction (connection to Charlottetown), Summerside and Alberton.
In the 20th century, Georgetown's industrial base diversified to include the Island's only shipyard, East Isle Shipyard, now owned by J.D. Irving Limited (JDI), and well known for its construction of tugs such as Atlantic Spruce, Atlantic Oak and the Royal Canadian Navy's Glen class tugs.