Lemuel Ellsworth (1836–1898) was a member of the Wisconsin State Assembly.
Ellsworth was born on December 27, 1836, in Esopus, New York.
On January 2, 1860, Ellsworth married Helen "Nellie" Lucinda Jones (1841–1881).
Ellsworth died September 4, 1898, in Milwaukee.
Ellsworth was a member of the Assembly during the 1875 and 1876 sessions.