Grady is a surname of Irish origin, derived from the Irish word gráda ("noble"). Notable people with the surname include:
Benjamin F. Grady (1831–1914), U.S. Congressman from North Carolina
Dennis Grady (1886–1974), American college sports coach
Don Grady (born 1944), American composer, musician and actor
Henry W. Grady (1850-1889), American journalist and orator
J. Harold Grady (1917–2002), Mayor of Baltimore, Maryland
James Grady (born 1971), Scottish former footballer
James Grady (author) (born 1949), American author of thriller novels
John Grady (disambiguation), several people
Mike Grady (baseball) (1869-1943), American Major League Baseball player
Patrick Grady, Scottish National Party politician, MP for Glasgow North since 2015
Thomas Grady (disambiguation), several people
Wayne Grady (born 1957), Australian golfer
Wayne Grady (author) (born 1948), Canadian writer, editor
