Joseph D. Moody (November 14, 1841 – November 17, 1909) was a U.S. dentist and served as president of the Historical Society of Southern California. Moody was born in Ashland, Ohio in 1841. He attended school in Ashland. On November 2, 1861, he enlisted in Co. I, 42nd Ohio Infantry of which regiment James A. Garfield was colonel. For nearly a year, he acted as Garfield's private secretary. Serving for 37 months, he was promoted to the rank of first lieutenant, an mudstered out with that rank.