Rosbys Rock is an unincorporated community in Marshall County, West Virginia, United States.

The community was named after Roseby Carr, who with his son led two railroad construction crews that met on December 24, 1852 and thereby connected the Baltimore and Ohio Railroad to the Ohio River near a huge (900 cubic yard) sandstone boulder near the original town site.

[2] At the height of train service, eight passenger trains and eight to twelve freight trains passed through the town daily, and B&O crews kept painting a memorial sign (originally carved with typographical error) on the rock.

[3][4][5] The historical marker about the event is about 5 miles west of the actual rock, at the intersection of Lafayette and 12th Streets near the Ohio River bridge, with additional signage on 12th street pointing the route to Grave Creek Road.

This article about a location in Marshall County, West Virginia is a stub.