The Hanover Town Library, also known as the Etna Library, is located at 130 Etna Road in Hanover, New Hampshire, United States. It is a public library serving the Etna section of the town; the Classical Revival building it occupies was the first purpose-built library building in the town, and is listed on the National Register of Historic Places. It is a modest brick building, designed by Dartmouth College professor Robert E. Fletcher and built in 1905.