The Mount Orne Bridge is a covered bridge over the Connecticut River between Lancaster, New Hampshire, and Lunenburg, Vermont. It joins Elm Street in South Lancaster with River Road in Lunenburg. Built in 1911, it is one of two Howe truss bridges across the Connecticut River. It was listed on the National Register of Historic Places in 1976.

Lunenburg is a town in Essex County, Vermont, United States. The population was 1,246 at the 2020 census, the most populous in Essex County. Lunenburg contains the villages of Lunenburg and Gilman and hamlets of West Lunenburg, South Lunenburg, and Mill Village, and is part of the Berlin, NH –VT Micropolitan Statistical Area.