Cedar Brook is a tributary of Cranbury Brook in Cranbury, New Jersey, United States.

Cedar Brook starts at 40°19′50″N 74°27′27″W / 40.33056°N 74.45750°W / 40.33056; -74.45750,[1] near Exit 8A on the New Jersey Turnpike.

It flows southwest, crossing Applegarth Road and Prospect Plains Road before crossing the Turnpike.

It then crosses Cranbury-South River Road and Route 130 and flows through a swamp area.

[1] This stream is large and accessible by many of the roads it crosses.