Blachleyville is an unincorporated community in Wayne County, in the U.S. state of Ohio.
Blachleyville was laid out in 1833 by William Blachley, and named for him. A post office called Blackleysville was established in 1830, the name was changed to Blackleyville in 1884, and the post office closed in 1907.
Coordinates: 40°45′52″N 82°04′56″W / 40.76444°N 82.08222°W