Shadyside is a village in Belmont County, Ohio, United States, along the Ohio River. It is part of the Wheeling, West Virginia Metropolitan Statistical Area. The population was 3,675 at the 2000 census.
Shadyside is located at 39°58′17″N 80°45′3″W / 39.97139°N 80.75083°W / 39.97139; -80.75083 (39.971385, -80.750752).
According to the United States Census Bureau, the village has a total area of 1.0 square miles (2.5 km²), of which, 1.0 square miles (2.5 km²) of it is land and 0.04 square miles (0.1 km²) of it (2.04%) is water.