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 , of which (or 99.13%) is land and (or 0.87%) is water.
The township contains three cemeteries: Georgetown, Pelley and Sugar Ridge.