I have also had this question on my mind. Any surviving WW2 Generals or Admirals in any contry? Perhaps in the former Soviet Union?
Wikipedia has this list:
http://en.wikipedia.org/wiki/List_of_surviving_veterans_of_World_War_II
However, it is for surviving veterans, and doesn’t differentiate if they later attained the rank or held it during the war.
USA: "The last living WWII General or Admiral was actually Commodore Arleigh Burke, U.S. Navy. As the Chief of Staff Admiral Mitscher in 1945 he was promoted from Captain to Commodore (1 Star). He later became the longest serving Chief of Naval Operations from 1955-1961. He passed away on January 1, 1996."
GERMANY:"The last living general officer of the Wehrmacht and most possibly the last living general officer to have been on the battlefield had been Luftwaffe General Heinrich Trettner, who got promoted from Colonel to Lieutenant General rank in late 1944, when he became CO of 4.Fallschirmjaeger-Division." Died 9/18/06
OTHER:"There is one still living flag officer of WWII as of 2012: the King of Romania.
Although Commander-in-Chief by the reason of being the ruling King, he adopted the military rank of Field Marshal on May 10, 1941, being the third out of four Marshals of the Romanian history. This makes him at the same time the last living Marshal of the war, the last living flag officer from any arm of service and the last recipient of the rarest and most prestigious military decoration of WWII, the Soviet Order of Victory."