Lyle is a city in Mower County, Minnesota, United States. The city lies on the north side of the Iowa border. The population was 522 at the 202…Lyle is a city in Mower County, Minnesota, United States. The city lies on the north side of the Iowa border. The population was 522 at the 2020 census. Lyle was platted in 1870. The city was named after Robert Lyle, a farmer, territorial, and state legislator. Lyle was incorporated in 1875.