John Godolphin (1617–1678) was an English jurist and writer, and Judge of the High Court of Admiralty under the Commonwealth.
He took the Parliamentarian side, and on 30 July 1653 was appointed judge of the admiralty, with William Clerk and Charles George Cocke.
After Clarke's death Godolphin and Cock were reappointed in July 1659 to hold the same office until 10 December.
He was four times married, and had by his first wife a son, Col. Sidney Godolphin (1652–1732) of Thames Ditton, Surrey, MP, Auditor of the Principality of Wales, Governor of the Scilly Isles, etc, who married Susanna Tanat, youngest daughter and co-heiress of Rees Tanat of Abertanat, Shropshire (per her monument in Llanyblodwel Church).
Sidney's daughter Mary married Henry Godolphin, Dean of Saint Paul's Cathedral (her father's second cousin), as is stated on her mother's monument in Llanyblodwel Church.