 It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area.Mill Creek Township was formed from part of Muncy Township on February 25, 1879 by the order of a judge who certified the results of an election regarding a petition to form the new township by the residents of what was the northern portion of Muncy Township.Held on December 10, 1878, the election had been close, with a 122-104 vote in favor of the measure.