Milford Square is a census-designated place in Milford Township, Bucks County, Pennsylvania, United States. It is located along PA Route 663 near the borough of Trumbauersville. As of the 2010 census, the population was 897 residents. While the village has a PO Box post office, with the ZIP code of 18935, the surrounding area uses the Quakertown ZIP Code of 18951. Milford Square is located on Unami Creek, also known as Swamp Creek, which drains into the Perkiomen Creek.