Coordinates: 49°15′49″N 95°02′45″W / 49.2636142°N 95.0457290°W
Angle Township is a township in Lake of the Woods County, Minnesota, United States. The population was 119 at the 2010 census. At 49.22° north latitude, it is the northernmost township in Minnesota and the northernmost point in the contiguous 48 states. (See extreme points of the United States and Northwest Angle.) The unincorporated communities of Oak Island, Angle Inlet and Penasse are located in the township.
According to the United States Census Bureau, the township has a total area of 596.3 mi2 (1,544.5 km2); 123.1 mi2 (318.8 km2) is land and 473.2 mi2 (1,225.7 km2) (79.63%) water.
The initial establishment of Angle Township being in the United States was due to a map-maker's error. Benjamin Franklin and British representatives established the initial U.S. and Canadian borders in the Treaty of Paris in 1783 from a map that mis-represented the source of the Mississippi River. In 1997, in order to change what were considered unequal fishing regulations between the U.S. and Canada, Angle Township resident Gary Dietzler utilized this cartographical mishap to implement a mock secession from the United States, going so far as to get a bill issued by their Congressman Collin Peterson (D) in the U.S. House of Representatives. The mock secession succeeded in getting fishing regulations better synchronized across these international (fresh) waters.