Arcada Stark Balz (December 31, 1879 – August 18, 1973) was an American educator, clubwoman, and politician in the state of Indiana who became the first woman elected to the Indiana Senate, serving two consecutive four-year terms from 1943 to 1950 and representing Johnson and Marion Counties. Prior to entering politics, Balz was a teacher in the Indianapolis public schools and a leader in the woman's club movement in the state. Balz was the president of the Indiana Federation of Women's Clubs from 1935 to 1937. In addition, she served as president of the New Harmony Memorial Commission from 1939 to 1947.