Chichester is a town in Merrimack County, New Hampshire, United States.

[2] Chichester was granted in 1727 to Nathaniel Gookin and others,[3] and was named for Thomas Pelham-Holles, 1st Duke of Newcastle-upon-Tyne, Earl of Chichester and England's Secretary of State for the Southern Department.

[1] The highest point in Chichester is an unnamed summit at 1,015 feet (309 m) above sea level, midway between Garvin Hill (985 ft or 300 m) to the east and Plausawa Hill (1,000 ft or 300 m) to the west in neighboring Pembroke.

The west side of Chichester drains to the Soucook River in Loudon, while the east side drains to the Suncook River, which forms the town's northeast border with Pittsfield.

17.1% of all households were made up of individuals, and 6.3% had someone living alone who was 65 years of age or older.