William S. Peck Sr.

William Smith Peck Sr. (1873–1946) was a Democratic member of the Louisiana House of Representatives from Sicily Island in Catahoula Parish, Louisiana, having served from 1920-1928.

Peck, a businessman and farmer, was married to the former Estelle Woodard (1893–1983). Their children were William S. Peck Jr. (1916–1987), who held the same House seat as his father from 1956 to 1964; Barbara Jane Peck Gilbert (1922–1987), the first wife of retired State Senator J.C. "Sonny" Gilbert, and Henry C. Peck Sr. (1919–1987), a Sicily Island banker, contractor, cattleman, and farmer. He was affiliated with the Methodist Church.