Bluffton, originally known as Shannon, is a village in Allen and Hancock counties in the U.S. state of Ohio.

The Allen County portion of Bluffton is part of the Lima Metropolitan Statistical Area, while the Hancock County portion is part of the Findlay Micropolitan Statistical Area.

The village was founded in 1831 by Swiss Mennonites, German Reformists and Irish Catholics.

When the citizens chose to incorporate as a village, the Irish suggested the name 'Shannon' because of the green fields around the area.

Bluffton is located approximately halfway between Lima and Findlay in northwest Ohio along Interstate 75.

The downtown area is anchored by the 19th century town hall and includes a local farmers market on Saturday mornings from May through October.

With an average of 20 vendors, shoppers can choose from local foods and produce, as well as potted herbs, annuals, perennials, shrubs, and trees.

Bluffton High School sports participate in the Northwest Conference, an athletic body sanctioned by the Ohio High School Athletic Association (OHSAA) which includes the Ada Bulldogs, Allen East Mustangs, Bluffton Pirates, Columbus Grove Bulldogs, Convoy Crestview Knights, Delphos Jefferson Wildcats, Lincolnview Lancers, Paulding Panthers, and Spencerville Bearcats.

[12] Bluffton and the nearby University of Findlay announced a merger in March 2024, to be complete by fall 2025.

[13] WBWH-LP (96.1 FM) serves the Bluffton community as its only full-time radio station.