Ian James Alastair Graham OBE (12 November 1923 – 1 August 2017) was a British Mayanist whose explorations of Maya ruins in the jungles of Mexico, Guatemala, and Belize helped establish the Corpus of Maya Hieroglyphic Inscriptions published by the Peabody Museum of Harvard University. Among his related works is a biography of an early predecessor, the 19th-century British Maya explorer Alfred Maudslay.