Rodeo is an unincorporated community and census-designated place in Hidalgo County in the southwestern corner of New Mexico at 31°50′13″N 109°01′54″W / 31.83694°N 109.03167°W / 31.83694; -109.03167. It lies less than one mile from the border with Arizona on New Mexico State Highway 80. As of the 2010 census, the population of Rodeo was 101.