Mechanicsville is a crossroads community located in "The Wedge", a geometric oddity arising out of ambiguity in the 18th Century border dispute settlement between the Penns and Calverts in the British North American Colonies. Until 1921, Mechanicsville was claimed by both Pennsylvania and Delaware. Then the resolution allocated Mechanicsville and The Wedge to Delaware. Mechanicsville is located at 39°43′01″N 075°47′01″W / 39.71694°N 75.78361°W.