Jefferson Township is a township in Jackson County, Kansas, United States. As of the 2000 census, its population was 494.
Jefferson Township was formed in 1858.
Jefferson Township covers an area of 36.39 square miles (94.26 square kilometers); of this, 0.04 square miles (0.11 square kilometers) or 0.12 percent is water.
The township contains one cemetery, Circleville.