Miller Township is one of fourteen townships in Dearborn County, Indiana. As of the 2010 census, its population was 9,810 and it contained 3,651 housing units. Miller Township was organized in 1834. According to the 2010 census, the township has a total area of 26.37 square miles, of which 26.14 square miles is land and 0.23 square miles is water.