Fielding Lucas Jr. (September 3, 1781 – March 12, 1854) was an American cartographer, an artist and a publisher of prominence during the early 19th century. He is known as the earliest successful commercial map publisher in the city of Baltimore. The first of his atlases was published in 1815–17, in which the maps are closely associated with the 1822 edition of Philadelphia atlas by Carey & Lea.