Sir John Cullum, 6th Baronet (21 June 1733 – 9 October 1785) was an English clergyman and antiquary.

[1] In April 1762, he was presented by his father to the rectory of Hawstead and in December 1774, he was instituted to the vicarage of Great Thurlow, also Suffolk.

Among his circle were the Duchess of Portland, Mary Delany, Richard Gough who began his Sepulchral Monuments at Cullum's prompting, Michael Lort, Peter Sandford, Thomas Pennant, James Granger, George Ashby, Michael Tyson, John Lightfoot, and William Cole.

[1] Cullum devoted time to the preparation of The History and Antiquities of Hawsted and Hardwick in the County of Suffolk, published in No.

[1] Cullum married at West Ham, Essex, 11 July 1765, Peggy, only daughter of Daniel Bisson distiller of Three Mills, who died in August 1810.