Paunnacussing Creek, also spelled Paunacussing and Paunaucussing, is a tributary of the Delaware River contained wholly within Bucks County, Pennsylvania, in the United States. It rises from a pond north of Mechanicsville in Buckingham Township and drains into the Delaware at Bull's Island just upstream of Lumberville in Solebury Township. Notable crossings include the Carversville Stone Bridge and an aqueduct of the Delaware Canal.