The Croatian Volleyball Federation (HOS) (in Croatian: Hrvatski odbojkaški savez) is the governing body of volleyball in Croatia. It is based in Zagreb.
It organizes the following volleyball leagues:
It also organizes the Croatian national volleyball team and the Croatian national women's volleyball team. The HOS was formed in 1946. It is a member of the Fédération Internationale de Volleyball and the Confédération Européenne de Volleyball.