J. T. Lloyd (fl. c. 1852 - 1865) was a New York City based map publisher active in the middle of the 19th century. J. T. Lloyd should not be confused with the competing New York map publisher, H. H. Lloyd, with whom he was often in conflict. Lloyd's maps, despite being printed in New York, frequently focused on the southern states, then in the midst of the American Civil War. Lloyd's maps are noteworthy for their stupendous size and extensive detail as much as for their bombastic advertisements and self-promotion, with which he decorates both the rectos and versos. Surprisingly, given his propensity for self-aggrandizement, very little is known of Lloyd or his life.