David and Lucy Tarr Fleming Mansion, also known as the Oxtoby Mansion, is a historic home located at Wellsburg, Brooke County, West Virginia.

It was built in 1845, and is a 2+1⁄2-story, five-bay, rectangular brick dwelling with a hipped roof in the Greek Revival style.

It sits on a stone ashlar foundation and features a full-length portico with a hipped roof supported by six Ionic order columns.

Also on the property are a contributing garage and carriage house.

This article about a property in Brooke County, West Virginia on the National Register of Historic Places is a stub.