Radek is a name, used as a surname and given name.
As a surname, it may refer to:
Karl Radek (1885–1939), Bolshevik and international Communist leader
General Ivan Radek, communist terrorist leader of Kazakhstan in the Air Force One movie
Viktor Radek, fictional character from the computer games Sin Episodes
As a given name, it may refer to:
Radek Bejbl (born 1972), retired Czech footballer
Radek Bonk (born 1976), Czech ice hockey player
Radek Černý (born 1974), Czech goalkeeper for Queens Park Rangers
Radek Dvořák (born 1977), Czech ice hockey player for the Florida Panthers
Radek Martínek (born 1976), Czech ice hockey defenceman for the New York Islanders
Radek Sikorski (born 1963), Minister of Foreign Affairs of the Republic of Poland
Radek Šírl (born 1981), Czech midfielder for FC Zenit Saint Petersburg
Radek Štěpánek (born 1978), Czech tennis player
Radek Zelenka, character in the television series Stargate Atlantis