Whippany River

Map of the catchment area of Passaic and Hackensack River

Whippany River at the Frelinghuysen Arboretum

The Whippany River is a 32 km long tributary of the Rockaway River in northern New Jersey.

Its source is in the Morris County, Mendham Township in the west of Morristown. The direction of flow of the meandering river is east-north -east of Morristown and Whippany. It flows through the Troy Meadows and ends in Hatfield Swamp in Rockaway, shortly before it flows into the Passaic River.

The name is derived from the root of the Whippanong, formerly populated the area. Whippanong means " place of the willows ", according to the standing trees on the river ..