Pine Brook, sometimes spelled Pinebrook, is a census-designated place (CDP)[5] and unincorporated community in Montville Township, Morris County, New Jersey, United States.

Over 10,000 years ago, the area now known as Pine Brook was settled by Lenape tribes as part of the Lenapehoking.

The Lenape tribes maintained peace, and no significant battles were recorded in the area today known as Montville Township.

This part of the township of Montville is about 13 miles (21 km) from Newark, with which it is connected by a good road, which for three-quarters of the distance consists of a Telford pavement.

The soil consists mainly of loam on clay bottom, and is generally productive in grass, grain, vegetables and fruit.

For some years, considerable attention was given to planting choice fruit trees, and some reaped the benefits in apples and pears, which generally yielded a good return.

At this point, a tavern was kept over eighty years and for many years it did a legitimate and profitable business in the accommodations of "Sussex Teams", as they were called, which in large numbers used to pass this way toward Newark with loads of flour, feed, grain, butter, pork, and other produce from Sussex, Warren, and the upper parts of Morris county."