Alvord is a city in Doon Township, Lyon County, Iowa, United States. The population was 206 at the 2020 census. On September 26, 1892, Alv…Alvord is a city in Doon Township, Lyon County, Iowa, United States. The population was 206 at the 2020 census. On September 26, 1892, Alvord was incorporated as a city. Alvord is located at 43°20′32″N 96°18′13″W / 43.34222°N 96.30361°W.