Jefferson Township, Miami County, Indiana  Jefferson Township is one of fourteen townships in Miami County, Indiana, United States. As of the 2010 census, its population was 2,412 and it contained 1,044 housing units. Jefferson Township was organized in 1834. It is named for Thomas Jefferson, third President of the United States. According to the 2010 census, the township has a total area of , of which (or 98.80%) is land and (or 1.20%) is water. The township contains these five cemeteries: Courter, Eel River Chapel, Green Lawn, Koontz and Westlawn.