Dermody is a surname. Notable people with the surname include:
Clarke Dermody (born 1980), New Zealand rugby union footballer Dorothy Dermody (1909–2012), Irish fencer Frank Dermody (born 1951), American politician Jack Dermody (1910–1990), Australian rules footballer Jim Dermody (1898–1975), Irish hurler Joe Dermody (born 1972), Irish hurler Maeve Dermody (born 1985), Australian actress Matt Dermody (born 1990), American baseball player Thomas Dermody (1775–1802), Irish poet Tom Dermody, American politician Warren Dermody (born 1966), Manchester singer/songwriter