Little Rock Lake is a reservoir in Benton County, Minnesota, United States.

The lake was formed in 1911 by the impounding of the Mississippi River by the Sartell Dam 5 miles (8 km) downriver.

Little Rock Lake was named from Little Rock Creek.

[3] The lake has two public boat access points.

Water clarity in the lake is low (less than 1.5 feet) and there are almost no aquatic plants.