Located in the western part of the county, it borders the following townships: •
Miami Township - north •
Stonelick Township - northeast •
Batavia Township - east •
Pierce Township - south •
Anderson Township, Hamilton County - west •
Columbia Township, Hamilton County - northwest corner No municipalities are located in Union Township, although three
census-designated places are located in the township: • Part of
Mount Carmel in the west •
Summerside in the northwest • Part of
Withamsville in the south The township also contains the
unincorporated area of
Glen Este. The hamlet of Nine Mile had its own post office (under consecutive postmasters William D. Gaskins, William Holderfield, Charles A. John and George W. Irvin) from 19 April 1880 until September 1905, when mail was directed to
New Richmond. One legacy of the former hamlet of Nine Mile is Nine Mile Cemetery. ==Name and history==