The L. D. Fargo Public Library is a historic public library at 120 E. Madison Street in Lake Mills, Wisconsin.

Businessman Lorenzo Dow Fargo donated funds for the library to Lake Mills in 1899; the building was completed in 1902.

The two-story building has a rough fieldstone exterior, a projecting entrance block with a bargeboard roof above the entrance, four steep dormers with matching bargeboard on the front facade, and a steeple atop the gable roof.

When it opened, the library became a local community center as well, and both the local women's club and the city's branch of the Women's Christian Temperance Union used it as their headquarters.

[2] The library was listed on the National Register of Historic Places in 1982 and on the State Register of Historic Places in 1989.