Geoffrey Keith Pullum (; born March 8, 1945) is a British-American linguist specialising in the study of English.
Since 2007 he has been Professor of General Linguistics at the University of Edinburgh.
Pullum is a co-author of The Cambridge Grammar of the English Language (2002), a comprehensive descriptive grammar of English.
He is also a contributor to Language Log and Lingua Franca at The Chronicle of Higher Education.