Isaac O. Savage (September 30, 1833 – April 9, 1908) was an early writer of the history of Republic County, Kansas. He was active in the community as a local politician and later served as a state senator in the Kansas legislature. Savage was born in Moravia, New York on September 30, 1833. In 1948 and 1949 he completed academic coursework at Moravia academy. He then emigrated to Fairfield, Michigan to teach school until 1862. Savage was elected state senator for the 33rd district of Kansas in November 1876 on the Independent Republican ticket.