Lake Francis is a reservoir on the Connecticut River in northern New Hampshire, United States.

The lake is impounded by Murphy Dam, built in 1940 as a flood control project.

[1] The 117-foot (36 m) earthen dam is owned by the Water Division of the state's Department of Environmental Services, and is operated by TC Energy (formerly TransCanada Corporation).

[5] There are two public boat launch locations,[1] and ice fishing is permitted from January through March.

[1] Lake Francis State Park is located on the northeast side of the lake, where the Connecticut River flows in.