Alexander Radó (5 November 1899, Újpest, near Budapest – 20 August 1981, Budapest), also: Alex, Alexander Radolfi, Sándor Kálmán Reich or Alexander Rado, was a Hungarian cartographer and a Soviet military intelligence agent in World War II.
Radó (codename: DORA) was also member of the resistance (German: Widerstandskämpfer) to Nazi Germany devoted to the service of the so-called Red Orchestra, the Soviet espionage and spy network to Western Europe between 1933 and 1945.
There he was the head of the Switzerland resistance group Red Three, one of the most efficient residents of the Red Orchestra.