Matthew Louis Gaetz II (born May 7, 1982) is an American lawyer and politician who has served as the U.S. representative for Florida's 1st congressional district since 2017. The district includes portions of Walton County and most of Escambia, Okaloosa, and Santa Rosa counties. A member of the Republican Party, he is widely regarded as a staunch proponent of far-right politics as well as an ally of former president Donald Trump.

The son of prominent Florida politician Don Gaetz and grandson of North Dakota politician Jerry Gaetz, Gaetz was raised in Fort Walton Beach, Florida. After graduating from the William & Mary Law School in Williamsburg, Virginia, he briefly worked in private practice before running for state representative. He served in the Florida House of Representatives from 2010 until 2016, and received national attention for defending Florida's controversial "stand-your-ground law". In 2016, he was elected to the U.S. House of Representatives, and was reelected in 2018, 2020, and 2022.