Templeton Township is a township in Atchison County, Missouri, United States. At the 2020 census, its population was 32.
Templeton Township was established in 1870, and named after John W. Templeton, a county official.
Templeton Township covers an area of and contains no incorporated settlements.
Nishnabotna Lake is within this township.
Evans Island is a land feature along the Missouri River, in the western portion of the township, which begins south of the mouth of the Nishnabotna River and continues to a point north of Brownville, Nebraska. It is bounded on its east by the State Line Slough and comprises much of the Nishnabotna Conservation Area.
Templeton Township contains one airport, Rock Port Municipal Airport.