Joan Ophelia Gordon Bell (1915–1975), known as Ophelia, was an English sculptor, known for her several commissions for the United Kingdom's Atomic Energy Authority.
She was born in London on 1 July 1915, the daughter of the painter Winifred Gordon Bell, (née Billinge. She studied at Regent Street Polytechnic in the 1930s and exhibited at the Royal Academy, the Royal Glasgow Institute of the Fine Arts and the Royal Scottish Academy, all before the age of 24.
She married the landscape artist William Heaton Cooper (1903–1995) in 1940. They lived in Grasmere in the English Lake District, and had two daughters and two sons, one of them being the painter Julian Cooper. Both Bell and her husband were followers of Moral Re-Armament. The couple held a joint exhibition at the Fine Art Society's London gallery in 1955. Bell died in Grasmere in 1975 and is buried in the village cemetery.