Frederick is an unincorporated community in Miami County, in the U.S. state of Ohio.
Former variant names of Frederick were Fredericktown and Fidelity. A post office called Fidelity was established in 1849, and remained in operation until 1907. Frederick was named for Frederick Yount, a pioneer settler.
39°55′32″N 84°16′29″W / 39.92556°N 84.27472°W