Aubrey Lyle Dunn Jr. (born 1955 or 1956) is an American politician and banker from the state of New Mexico. He served as New Mexico commissioner of public lands from 2015 to 2019, and was a candidate for the U.S. Senate in the 2018 election. Elected as a Republican, Dunn switched parties to Libertarian in January 2018, making him the first Libertarian holder of a statewide elected office in the United States.