Bryan is a city in Williams County, Ohio, United States. It is the county seat of Williams County, and the largest city in the county. Bryan and Williams County were originally part of Defiance County, with Defiance being the county seat. The county seat was later moved to Bryan, and the county split into Williams and Defiance. Bryan was named the county seat, but not without conflict: the village of Montpelier was considered a more centralized location of Williams County.
The people of Montpelier petitioned the state, but in the end Bryan was named county seat because of its greater industrial and commercial importance and because of its higher population. To this day, many people still argue about the state's decision. A strip of Williams County north of Bryan was originally part of a conflict, the Toledo War, between Ohio and Michigan. Both states claimed the land, the Toledo Strip, which was named for the port city of Toledo at its eastern end. The conflict was eventually resolved in favor of Ohio, with Michigan being compensated with what is now the western Upper Peninsula.