Santiago Jacob Duckworth (June 13, 1865 – June 28, 1930), known locally as S. J. Duckworth, served in the California State Assembly for the 61st district from 1893 to 1895. He was as an early Monterey pioneer businessman, real estate developer, and visionary of the short-lived Carmel City. In 1889, he wanted to build a Catholic summer resort, bought the rights to develop the area, filed a subdivision map, and started selling lots.