The Church of St. Nicholas or Karlovac Cathedral (Serbian: Саборна црква Светог Николе у Карловцу[2]), is a Serbian Orthodox church located in Karlovac, in central Croatia.

The local Serbian community collected money for today's church in 1781 and a request for permission to build it sent to authorities in 1784.

[4] Construction costs were 30,000 Forints which were collected by the members of the local church municipality and by Serb merchants from Karlovac and Trieste.

[4] Arsa Teodorović painted icons for the church's iconostasis and the building was sanctified by Bishop Petar Jovanović in 1803.

This article about a church building or other Christian place of worship in Croatia is a stub.