Penns Neck or Penn's Neck may refer to:
Penns Neck, New Jersey, an unincorporated community in Mercer County, New Jersey Penns Neck Baptist Church
Penns Neck (cape), a cape on the Delaware River in Salem County, New Jersey Penn's Neck Township, New Jersey, former township in Salem County, New Jersey Lower Penns Neck, New Jersey, now Pennsville Township Upper Penns Neck, New Jersey, now Carneys Point Township
See also Churchtown, New Jersey, also known as Penns Neck, Salem County, New Jersey