Mladen (Cyrillic script: Младен) is a common masculine given name of Slavic origin used in South Slavic languages. The names stems from the Slavic root mlad, meaning "young". Notable people with the name include:
Mladen I Šubić Bribirski, Croatian member of the Šubić noble family
Mladen II Šubić Bribirski, Croatian member of the Šubić noble family
Mladen III Šubić Bribirski, Croatian member of the Šubić noble family
Mladen Stojanović, Bosnian Serb leader of Yugoslav Partisans
Mladen Bartolović, Bosnian footballer
Mladen Dolar, Slovenian philosopher
Mladen Erjavec, Croatian basketball coach
Mladen Krstajić, Serbian footballer
Mladen Petrić, Croatian footballer
Mladen Rudonja, Slovenian footballer
Mladen Šekularac, Montenegrin basketball player
Mladen Stanev, Bulgarian conductor and chorus master
Mladen Vasilev, Bulgarian footballer
Karl Malden (born Mladen George Sekulovich), American actor
