Elrod is an unincorporated community in Clark County, in the U.S. state of South Dakota.
Elrod was originally called Ida. The community's present name is for Samuel H. Elrod, a personal friend of the original owner of the town site; Samuel Elrod later served as Governor of South Dakota from 1905 to 1907. A post office was established as Ida in 1883, renamed Elrod in 1884, and the post office was discontinued in 1954.
Coordinates: 44°53′11″N 97°34′25″W / 44.88639°N 97.57361°W