In a few years after the construction of the irrigation system, the Elmore to Cohuna railway was completed in 1915 to help facilitate economic growth in Pine Grove. With the train station being named Bamawm and the post office having the name Pannoobamawm, rail authorities requested a list of names to be submitted to them to help create an official name for the township. The locals of the area eventually suggested the town be named after William Lockington, a prominent Jesuit priest in the early 20th century. With no other places holding such a name, Lockington was officially gazetted in 1921.