Liberty Mills is an unincorporated community on the Eel River in Chester Township, Wabash County, in the U.S. state of Indiana. Proprietor John Comstock platted the town June 24, 1837. The name Liberty Mills comes from the number of mills the town once operated, including a saw mill, a carding mill, and a distillery, with one of the mills coming from the ‘Liberty’ brand. Its ZIP code is 46946.