Plum Grove is a historic house located in Iowa City, United States.

Built in 1844, Robert Lucas lived in the house with his wife, Friendly, and several children and grandchildren.

The grounds have been the focus of archaeological research since 1974, documenting Iowa frontier history and changes in farming from 1844 until 1943.

Most of this work was led by the late Dr. Thomas Charlton who was with the University of Iowa's Department of Anthropology.

Previous excavations have uncovered house additions, outbuildings, and a large trench full of butchered animal bones.