Guy Louis Moser (January 23, 1886 – May 9, 1961) was a Democratic member of the U.S. House of Representatives from Pennsylvania. Guy L. Moser was born on a farm in Amity Township, Berks County, Pennsylvania. He attended the Keystone State Teachers’ College in Kutztown, Pennsylvania. He was engaged in painting and paperhanging from 1898 to 1904. He taught school in Amity Township in 1903 and 1904. He was a railway postal clerk from 1904 to 1914, and a post office inspector from 1914 to 1926. He was engaged in investment banking in Philadelphia, Pennsylvania, from 1926 to 1931 and later in agricultural pursuits. He was an unsuccessful candidate for the Democratic nomination for Congress in 1932 and 1934.