John McLenan was an American illustrator and caricaturist. Active from 1852 to 1865, his works include illustrations of Charles Dickens' A Tale of Two Cities and Great Expectations for Harper's Weekly and illustrations for two Wilkie Collins novels. Author Sinclair Hamilton wrote of McLenan
Discovered by DeWitt C. Hitchcock working in a pork-packing establishment in Cincinnati and making drawings on the tops of barrels, McLenan became one of the most prolific of our [i. e., America's] early illustrators.. .. . He was also well known as a comic draftsman. His work will bear comparison with the best of his time.
Some of his cartoons make use of the text comics format, making him a pioneer in comics.