Ratko (Cyrillic script: Ратко) is a male given name of Slavic origin, a diminutive form of such names: Ratibor, Ratimir etc., containing word rat meaning "war". The name may refer to:
Ratko Čolić (1918–1999), Serbian footballerRatko Đokić, "The Godfather", arms dealer, cigarette smuggler, murdered May 5, 2003Ratko Dautovski, Macedonian percussionist, interested in world percussionRatko Delorko, German pianist, composer, producer and conductorRatko Đokić (1940–2003), Yugoslavian-Swedish mob boss, a leader of the so-called "Cigarette Mafia"Ratko Dostanić (born 1959), Serbian football (soccer) head coachRatko Glavina (born 1941), Croatian actorRatko Janev (born 1939), physicistRatko Kacian (1917–1949), Croatian footballerRatko Mladić (born 1942), Chief of Staff of the Bosnian Serb Army during the Bosnian War of 1992–1995Ratko Nikolić (born 1977), Serbian handballerRatko Ninković (born 1967), football manager and former player from Bosnia-HerzegovinaRatko Perić (born 1944), the Bishop of Mostar-Duvno and Apostolic Administrator of Trebinje-MrkanRatko Radovanović (born 1956), basketball playerRatko Rudić (born 1948), Croatian water polo coachRatko Stevović, Montenegrin football managerRatko Štritof (born 1972), Croatian water polo playerRatko Svilar (born 1950), former Serbian football goalkeeperRatko Vansimpsen (born 1989), Belgian footballerRatko Varda (born 1979), Serbian professional basketball playerRatko Vujović (born 1916), Montenegrin political activist and soldierRatko Zjaca, Croatian guitarist