Pottsgrove Township was formed on August 20, 1806 from portions of Douglass and New Hanover Townships. Pottsgrove Township was divided into Lower Pottsgrove and Upper Pottsgrove Townships on December 2, 1889. In 1899, the General Assembly passed a law grouping townships into two classes. At this time, Lower Pottsgrove Township became a township of the second class. Following its split from Upper Pottsgrove, Lower Pottsgrove Township experienced several annexations of territory from the neighboring Pottstown Borough. On January 16, 1931, the Borough of Pottstown annexed two portions of Lower Pottsgrove Township: from Moser to Porter Road and an area bounded by Prospect to Mervine and Adams to Charlotte Streets because Pottstown believed “the township had been taking tax money for years and giving nothing in return.” In 1942, Pottstown annexed a little more than five acres bounded by North Hills Boulevard, Mulberry Street and Keim Street.