Harriet Windsor-Clive, Baroness Windsor was a landowner and wealthy benefactor in the Penarth and Cardiff area of South Wales. She is probably best known for developing Penarth Dock in competition with the Marquess of Bute's docks in Cardiff and for her charitable donations in the area. A daughter of the 5th Earl of Plymouth, she was granted the title 13th Baroness Windsor in 1855 after the deaths of her sister and brother.

Penarth is a town and community in the Vale of Glamorgan, Wales, approximately 3 miles (4.8 km) south of Cardiff city centre on the west shore of the Severn Estuary at the southern end of Cardiff Bay.