Helmsburg (also Helms) is an unincorporated community in southern Jackson Township, Brown County, in the U.S. state of Indiana. It lies along State Road 45 north of the town of Nashville, the county seat of Brown County.DeLorme. Indiana Atlas & Gazetteer. 3rd ed. Yarmouth: DeLorme, 2004, p. 50. . Its elevation is 666 feet (203 m). Although Helmsburg is unincorporated, it has a post office, with the ZIP code of 47435.
