First granted in 1762 by New Hampshire's
colonial Governor
Benning Wentworth, the territory was named "Dryden", after English poet and playwright
John Dryden. Due to the inability of its original grantees to settle the remote area, however, it was regranted in 1770 by Colonial Governor
John Wentworth, who renamed it "Colebrook Town" after
Sir George Colebrooke, the
East India Company's chairman of the board. It was settled that same year by a single family by the name of
Rosebrook, but the family was driven out by the
Revolutionary War, and further settlement did not occur until after the war's end. The 1790 census recorded a population of 29, and the town was incorporated as Colebrook on June 11, 1796. For many years, it was the
shire town of the Northern Judicial District of Coos County. Today, it has a district branch of the
Lancaster Superior Court. A conflicting account holds that the town "was originally called Coleburne and was granted to Sir George Colebrook and others. It was incorporated June 11, 1795." The first road through the town was known as River Road, taking a route that is roughly followed today by
U.S. Route 3, the
Daniel Webster Highway. The first surveyed lots in the town comprised about each, running from River Road to the
Connecticut River. Settlement then proceeded up two new roads, Titus Hill Road and what is now Pleasant Street. Titus Hill leads southeast out of the town center up to high ground in the neighboring town of
Columbia that supports farming, while Pleasant Street, now a short road in Colebrook village, led east up the valley of the
Mohawk River (now the route of
New Hampshire Route 26) to the area of East Colebrook, the present-day village of Kidderville, and what was known as "Factory Village", which grew about east of the present village of Colebrook around a woolen mill constructed in 1816.
Serial killer Christopher Wilder's nationwide murder spree ended at a Colebrook gas station on April 13, 1984, when two
New Hampshire state troopers attempted to apprehend him, but in a scuffle Wilder shot and killed himself as well as seriously wounding one of the troopers. On August 19, 1997,
Carl Drega carried out a shooting spree in the town killing two
state troopers, a judge and a newspaper editor. He was later killed in a shootout with law enforcement in
Vermont. File:Main Street, Colebrook, NH.jpg|Main Street Image:Monadnock House, Colebrook, NH.jpg|Monadnock House Image:Parsons Street, Colebrook, NH.jpg|Parsons Street Image:Bridge Street, Colebrook, NH.jpg|Bridge Street ==Geography==