Jacob Riegel Jr. (October 26, 1889 – June 13, 1959) was an artist known for his pictorial maps. Riegel was born in Philadelphia. Like his father before him he attended Princeton University from which he graduated in 1912. During World War I, Riegel joined the Army Sanitary Corps, and after basic training at Fort McPherson, was sent abroad with the rank of Sergeant. In 1916 he joined the art department at the Philadelphia lithography and printing firm of John Louis Ketterlinus and Company. Riegel produced artwork for greeting cards, book plates, armorial crests, and of course, pictorial maps. HIs art became quite popular, enough that c. 1930, he contracted the Engle Press of Philadelphia to reproduce his work upon request. Riegel lived at 6003 Wayne Avenue, and later at 55 Schoolhouse Lane, both in Germantown, PA. He is interred at Laurel Hill Cemetery in Philadelphia PA.