New Hampshire Route 11 is a 108.223-mile-long (174.168 km) east–west state highway in New Hampshire, running completely across the central part of the state. Its western terminus is at the Vermont state line in Charlestown, where it continues west as Vermont Route 11. The eastern terminus is at the Maine state line in Rochester, where it crosses the border with U.S. Route 202 and continues as Maine State Route 11.

Charlestown is a town in Sullivan County, New Hampshire, United States. The population was 4,806 at the 2020 census, down from 5,114 at the 2010 census. The town is home to Hubbard State Forest and the headquarters of the Student Conservation Association.