Cressy or de Cressy is a surname. Notable people with the name include:
David Cressy, American historian and professor
Gordon Cressy (b. 1943), Canadian politician
Harold Cressy (1889–1916), South African headteacher and activist
Hugh de Cressy (d. 1189), Anglo-Norman administrator and nobleman
Hugh Cressy (MP), Member of Parliament for Nottinghamshire
Joe Cressy, (b. 1984), Canadian politician
Serenus de Cressy (c. 1605–1674), English monk