Hortonville is an unincorporated community in Washington Township, Hamilton County, Indiana, United States.A post office was established at Hortonville in 1883, and remained in operation until it was discontinued in 1933.[3] The community's namesake, John B. Horton, served as first postmaster.[4] The United States Census Bureau delineated Hortonville as a census designated place in the 2022 American Community Survey.This Hamilton County, Indiana location article is a stub.