Ranier rə-NEER) is a city in Koochiching County, Minnesota, United States. The population was 569 at the 2020 census. Ranier is located east of the city of International Falls, along State Highway 11. Fort Frances, Ontario is located directly across the river. Incorporated in 1908, the small village of Ranier began as a lively pioneer town filled with people eager to make their mark in the northland. Businesses sprang up all over Ranier, including hotels, grocers, saloons, and brothels.