The Patcham Pylon is a monumental gateway erected in 1928 near Patcham in East Sussex, England. Designed by local architect John Leopold Denman and paid for by public subscription, it commemorated the extension of the County Borough of Brighton on 1 April 1928, and stood close to the new northern boundary.

John Leopold Denman FRIBA was an architect from the English seaside resort of Brighton, now part of the city of Brighton and Hove. He had a prolific career in the area during the 20th century, both on his own and as part of the Denman & Son firm in partnership with his son John Bluet Denman. Described as "the master of ... mid-century Neo-Georgian", Denman was responsible for a range of commercial, civic and religious buildings in Brighton, and pubs and hotels there and elsewhere on the south coast of England on behalf of Brighton's Kemp Town Brewery. He used other architectural styles as well, and was responsible for at least one mansion, several smaller houses, various buildings in cemeteries and crematoria, and alterations to many churches. His work on church restorations has been praised, and he has been called "the leading church architect of his time in Sussex"; he also wrote a book on the ecclesiastical architecture of the county.