Big Falls is a city in Koochiching County, Minnesota, United States.

[5] The city was named for a nearby waterfall on the Big Fork River.

[6] According to the United States Census Bureau, the city has a total area of 6.06 square miles (15.70 km2), all land.

The racial makeup of the city was 97.0% White, 1.7% Native American, and 1.3% from two or more races.

The racial makeup of the city was 98.11% White, 0.38% Native American, 0.38% Asian, and 1.14% from two or more races.

About 12.0% of families and 14.7% of the population were below the poverty line, including 20.0% of those under the age of eighteen and 7.3% of those 65 or over.