Jefferson Township is a township in Clayton County, Iowa, United States.

Jefferson Township covers an area of 57.47 square miles (148.8 km2) and contains one incorporated settlement, Guttenberg.

According to the USGS, it contains nine cemeteries: Borcherding, Guttenberg, Lewis, Mount Olivet, Saint Johns, Saint Marys, Saint Michael, Saint Pauls and Stock School.

Jefferson Township contains three airports or landing strips: Abels Island Airport, GAA Private Airport and Walters Heliport.

This article about the geography of Clayton County, Iowa is a stub.