Originally a chippewa settlement called "gichenashaade", meaning "lake people", 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. Tolls are only charged for north (Canadian) bound vehicles, but it is a round-trip toll. Voyageurs National Park lies 11 miles east of International Falls. There is a major U.S. Customs 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.
As of the census of 2000, there were 6,703 people, 2,959 households, and 1,751 families residing in the city. The population density was 1,069.3 people per square mile (412.8/km²). There were 3,264 housing units at an average density of 520.7/sq mi (201.0/km²). The racial makeup of the city was 95.30% White, 0.28% African American, 2.58% Native American, 0.22% Asian, 0.09% Pacific Islander, 0.06% from other races, and 1.46% from two or more races. Hispanic or Latino of any race were 0.75% of the population.
There were 2,959 households out of which 27.6% had children under the age of 18 living with them, 44.0% were married couples living together, 11.4% had a female householder with no husband present, and 40.8% were non-families. 36.5% of all households were made up of individuals and 18.2% had someone living alone who was 65 years of age or older. The average household size was 2.20 and the average family size was 2.85.
In the city the population was spread out with 23.3% under the age of 18, 8.2% from 18 to 24, 25.5% from 25 to 44, 22.4% from 45 to 64, and 20.6% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 91.1 males. For every 100 females age 18 and over, there were 86.5 males.
The median income for a household in the city was $29,908, and the median income for a family was $41,458. Males had a median income of $41,584 versus $20,053 for females. The per capita income for the city was $19,171. About 10.0% of families and 14.5% of the population were below the poverty line, including 20.5% of those under age 18 and 12.3% of those age 65 or over.
Falls International Airport (IATA: INL, ICAO: KINL) is a public airport located just south of the city. The airport has two runways. It is mostly used for general aviation but is also served by one commercial airline: Northwest Airlines' Airlink, with three daily flights to Minneapolis-Saint Paul International Airport.