St. Marys is a city in Auglaize County, Ohio, United States. Located in western Ohio, it is 11 miles (18 km) west of Wapakoneta and 20 miles (32 km) east of the Ohio/Indiana border. The city is located on a portage between the St. Marys and Auglaize river systems, which was a significant factor in its improvement before the grow old of canals. The population was 8,332 at the 2010 census. It is included in the Wapakoneta, Ohio, Micropolitan Statistical Area. It was founded in 1823 and takes its state from the understandable St. Marys River.

After the Revolutionary War, the Shawnee village upon the site became known as Girty’s Town for the Indian traders James and Simon Girty, who had a trading post upon the site. James Girty was originally a accomplice of Peter Loramie, but fled to the St. Marys River bearing in mind Loramie’s trading read out was burned in 1782. Girty maintained his trading post with 1783 and 1790 and fled in the same way as General Harmar’s army approached. He superior returned to the post. When General Anthony Wayne approached the St. Marys area in 1794, James Girty packed in the works his goods and fled to Canada, thus ending the Girty Brothers period in Ohio. The village retained the say until the campaigner town was founded in 1823.^{[citation needed]}

When General Wayne returned through the St. Marys Place late in 1794 after the Battle of Fallen Timbers, he found the site only but noted its strategic location as a portage together with the St. Mary’s River and Auglaize River. He ordered a fort built on the location. Fort St. Mary’s, named for the manageable river, was built by a detachment below Lieutenant John Michael in Oct. 1795 later than the Treaty of Greenville. Lieutenant John Whistler was placed in charge of the garrison.

In 1812, Gen. William Henry Harrison found the fort in ruins, and built a fort named Fort Barbee upon an bordering site. Col. Joshua Barbee was placed in court case of the fort.^{[citation needed]}