Clark Fork Township was named after the creek of the same name within its borders.[2]
Geography
According to the United States Census Bureau, Clark Fork Township covers an area of 52.64 square miles (136.32 square kilometers); of this, 52.6 square miles (136.24 square kilometers, 99.94 percent) is land and 0.03 square miles (0.08 square kilometers, 0.06 percent) is water.