FL1, FL-1, or similar may refer to: FL1 (Lazio regional railways) Florida's 1st congressional district, a congressional district in the U.S. state of Florida Florida State Road A1A, formerly Florida State Road 1 Football League One, the second-highest division of The Football League and third-highest division overall in the English football league system a technical standard for the rating of flashlights a model of the Chinese Silkworm (missile) a taxicab, one of the List of Austin motor vehicles