William Gregory Watkins (1869–1959) was an architect who worked in Lincoln, England. He was the son of the Lincoln architectWilliam Watkins and his younger brother was the Nottingham architect Harry Garnham Watkins. He was a Diocesan surveyor for the Diocese of Lincoln and President of the Nottingham, Derby and Lincoln Society of Architects, 1937–1939. He was elected FRIBA in 1921.