Tocsin, IndianaTocsin is an unincorporated community in Lancaster [Township, Wells County, Indiana|Lancaster Township], Wells County, in the U.S. state of Indiana. It is on the border with Jefferson Township.HistoryTocsin was platted in 1884. A post office was established at Tocsin in 1882, and remained in operation until it was discontinued in 1966.DemographicsThe United [States Census Bureau] defined Tocsin as a census [designated place] in the 2022 American [Community Survey].