Paul Jacobsthal (23 February 1880 in Berlin – 27 October 1957 in Oxford) was a scholar of Greek vase painting and Celtic art.
In 1912 he published a catalog of the Greek vases in Göttingen, and received a position as a professor at the University of Marburg.
In 1930 Jacobsthal and Beazley began to collaborate on an inventory of early Greek vases, the Bilder griechischer Vasen, a project which they concluded in 1939.
After World War II, the two scholars served as co-editors of the Oxford Classical Monographs.
This book focused on the impact of Greek ornament on Celtic decorative arts, and was one of the earliest English-language works to employ the terminology established by Alois Riegl in his Stilfragen.