Karlo Šimek (born 3 June 1988) is a Croatian footballer who plays for NK Polet Tuhovec as a defender.
A graduate of the Varteks youth academy, Šimek was promoted to the senior squad in 2007, which changed its name to NK Varaždin in mid-2010.
In January 2012, he had a try-out with Kazakh club Shakhter Karagandy in Turkey, but in the process, he injured his leg.
[3] He ultimately signed for Karlovac after having made 103 appearances for Varteks / Varaždin.
[6] In January 2017, he signed with a different NK Varaždin, a club unassociated with the one he started his career with, but which went bankrupt in 2015.