International Falls is located on the Rainy River directly across from Fort Frances, Ontario, Canada. The two cities are connected by the Fort Frances – International Falls International Bridge. Voyageurs National Park is located 11 miles east of International Falls. There is a major U.S. Customs and Border Protection Port of Entry on the International Falls side of the toll bridge, and a Canadian Customs entry point on the north side of the bridge.
International Falls has the nickname "Icebox of the Nation", and with 109.4 days per year with maxima below , the airport has the most such days of any incorporated city in the contiguous US, just shading nearby Duluth and Houghton.