Mount Pleasant began in 1802 when Thomas McCullough purchased land and a gristmill and a sawmill on the Great Miami River in Fairfield Township, about two miles north of Hamilton. He bought the property from Solomon Line and later sold it to William Bigham. Mrs. Heiser said McCullough opened a general store at the mill and "quite a settlement sprang up around the McCullough place, and was known as Mount Pleasant." The mill was cutoff from the river after the 1805 flood, which changed its course. (Also see McCullough's Mill.) There also was a Mount Pleasant south of Butler County in Hamilton County. What is now called Pleasant Avenue in Hamilton and Fairfield formerly was known as Mount Pleasant Pike. In 1817 John P. LaBoiteaux and Samuel Hill platted Mount Pleasant around Hamilton Avenue and Compton Road in what is now Mount Healthy. It was Mount Pleasant until 1893 when incorporation proceedings started. That's when the name was changed because postal officials pointed out that Ohio already had another Mount Pleasant. Instead, it became Mount Healthy Oct. 10, 1893.