Ezra Townsend Cresson, also Ezra Townsend senior (18 June 1838, Byberry – 19 April 1926, Swarthmore) was an American entomologist who specialised in Hymenoptera.
He wrote Synopsis of the families and genera of the Hymenoptera of America, north of Mexico Philadelphia: Paul C.
Stockhausen, Entomological printer (1887) and many other works.
His son Ezra Townsend, Jr.
(1876–1948) was also an entomologist but a specialist in Diptera.
Cresson also documented many new species including Nomada texana.