Williamsport is an unincorporated community in Morrow County, in the U.S. state of Ohio.
Williamsport was laid out in 1836 by William Dakan, and named for him. A nearby post office operated under the name Andrews. This post office was established in 1833, and was discontinued in 1903.
Coordinates: 40°34′46″N 82°43′48″W / 40.57944°N 82.73000°W