Pompton Plains is a census-designated place[5] (CDP) and unincorporated community constituting the majority of Pequannock Township, Morris County, in the U.S. state of New Jersey.

Neighboring communities in Morris County are Riverdale to the north, Kinnelon to the west, Lincoln Park to the southwest, and the remainder of Pequannock Township to the south.

New Jersey Route 23 runs through the east side of the community, leading northwest 22 miles (35 km) to Franklin and south 5 miles (8 km) to Interstate 80 in Wayne.

Interstate 287 passes through the northwest part of Pompton Plains, with the closest access from Exit 52 (Route 23) in Riverdale.

People who were born in, residents of, or otherwise closely associated with Pompton Plains include: