Located in the southern part of the county along the
Ohio River, it borders the following townships: •
Byrd Township - northeast •
Huntington Township - southeast •
Jefferson Township - north •
Pleasant Township - northwest
Kentucky lies across the Ohio River to the southwest:
Mason County to the south, and
Bracken County to the west. The village of
Ripley is located in southwestern Union Township, along the Ohio River. ==Name and history==