Louis Gray

Louis or Lewis Gray may refer to:

• Louis Gray (footballer), Welsh footballer
• Louis Gray (producer), American film producer, of The Adventures of Champion
• Louis Herbert Gray (1875–1955), American orientalist
• Louis Harold Gray (1905–1965), British radiation physicist after whom the SI unit, the Gray, was named
• Lewis Cecil Gray (1881–1952), American agricultural economist
• Lou Gray, character in Along the Great Divide