Pine Brook, sometimes spelled Pinebrook, is a census-designated place (CDP) and unincorporated community located within Montville in Morris County, in the U.S. state of New Jersey. As of the 2020 United States census, the CDP had a population of 5,675.

Montville is a township in Morris County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 22,450, an increase of 922 (+4.3%) from the 2010 census count of 21,528, which in turn reflected an increase of 689 (+3.3%) from the 20,839 counted in the 2000 census.