Louis William Fairfield (October 15, 1858 – February 20, 1930) was an American educator and politician who served four terms as a U.S. Representative from Indiana from 1917 to 1925.

He served as chairman of the Committee on Insular Affairs during the Sixty-eighth Congress, from 1923 to 1925; he failed to be renominated by his party in 1924, thus terminating both his time as Congressman and his chairmanship.

After his time in Congress, he was occasionally engaged as a lecturer and lived in Angola, Indiana.

He was interred in Circle Hill Cemetery, Angola, Indiana.

This article incorporates public domain material from the Biographical Directory of the United States Congress