Zachary Martin Nunn (born May 4, 1979) is an American politician and United States Air Force officer who has served as the U.S. representative for Iowa's 3rd congressional district since 2023. A member of the Republican Party, he was a member of the Iowa Senate for the 15th district from 2019 to 2023 and the Iowa House of Representatives for the 30th district from 2015 to 2019.