Zerelda Gray Sanders Wallace (August 6, 1817 – March 19, 1901) was the First Lady of Indiana from 1837 to 1840, and a temperance activist, women's suffrage leader, and inspirational speaker in the 1870s and 1880s. She was a charter member of Central Christian Church, the first Christian Church (Disciples of Christ) in Indianapolis, Indiana. Her husband was David Wallace, the sixth governor of Indiana; Lew Wallace, one of her stepsons, became an American Civil War general and author.