Herbert A. Adderly (born June 8, 1939, Philadelphia, Pennsylvania) is a former American football cornerback who played for the Green Bay Packers and the Dallas Cowboys.

He played college football at Michigan State University and was an All-Big Ten offensive star.

Adderley was drafted by the Packers in the first round in 1961, and was projected to be a halfback or flanker, but soon saw that his playing opportunities would be limited on offense behind veteran Packer stars Paul Hornung and Jim Taylor. He was first moved to cornerback to replace an injured teammate. In 1962 the move became permanent and he went on to be an all-NFL selection 5 times in the 1960s.

He was a star for the Packers through 1969, then played three seasons (1970-1972) with the Dallas Cowboys.

He was elected to the Pro Football Hall of Fame in 1980.