Caldwell Township is one of eighteen townships in Appanoose County, Iowa, United States. As of the 2010 census, its population was 425. Geography Caldwell Township covers an area of and contains one incorporated settlement, Exline. According to the USGS, it contains five cemeteries: Hism, New Hope, Salem, Union and Zoar. References External links US-Counties.com City-Data.com Townships in Appanoose County, Iowa Townships in Iowa