William Ryan deGraffenried Jr. (April 2, 1950 – December 7, 2006) served as President Pro Tempore of the Alabama State Senate from 1987 to 1994.
DeGraffenried, as the President Pro Tempore of the state Senate, became next in line for the governorship for the remainder of the quadrennium.
He then returned to practicing law in Tuscaloosa and later became a contract lobbyist.
His father, Ryan DeGraffenried Sr., was also an Alabama politician.
He died unexpectedly of undisclosed natural causes in 2006 while attending a conference in Hoover, Alabama, aged 56.