Gillis William Long (May 4, 1923 – January 20, 1985) was an American politician and lawyer who served as a U.S. representative from Louisiana.

When his cousin Earl Long was running for Lieutenant Governor of Louisiana, Gillis gave campaign speeches for him at his school.

[1] In 1939, Long attended Louisiana State University for law, but was interrupted when he enlisted into the army in 1941 as a private.

[2] In 1962, he was elected to the House of Representatives from Louisiana's 8th congressional district and was selected to be the assistant Democratic Whip.

[6] On January 20, 1985, Long died from heart failure in Washington, D.C., and a moment of silence was given for him at Ronald Reagan's second presidential inauguration.