Spencer Gurdon Millard (July 10, 1856 – October 24, 1895) was an American Republican politician, lawyer and school teacher. He was elected as the 20th Lieutenant Governor of California, his term to run from 1895 to 1899, but died in office within the first year. In about 1880, he began the study of law with William O. Webster, an attorney at Ionia, and after studying for about two years he was admitted to the bar. He then became a member of the firm of Webster & Millard, in which he was engaged in the practice of law until he removed to Los Angeles, California, in 1887.