The Turkish Cypriot State was to have been one of the constituent state

Constituent state

A constituent state, constituent entity, or constituent part, is a territorial and constitutional entity forming part of a sovereign state...

s of the United Cyprus Republic proposed by the failed 2004 Annan Plan for Cyprus

Annan Plan for Cyprus

The Annan Plan was a United Nations proposal to resolve the Cyprus dispute, reuniting the breakaway Northern Cyprus with the Republic of Cyprus. The proposal was to restructure Cyprus as the "United Cyprus Republic", which would be a federation of two states. It was revised a number of times before...

 for the reunification of Cyprus

Cyprus

Cyprus , officially the Republic of Cyprus , is a Eurasian island country, member of the European Union, in the Eastern Mediterranean, east of Greece, south of Turkey, west of Syria and north of Egypt. It is the third largest island in the Mediterranean Sea.The earliest known human activity on the...

. Its territory would have corresponded to the portion of the island currently under the control of the internationally unrecognised Turkish Republic of Northern Cyprus, minus some small areas that would have been transferred to the Greek Cypriot State

Greek Cypriot State

The Greek Cypriot State was to have been one of the constituent states of the United Cyprus Republic proposed by the failed 2004 Annan Plan for Cyprus aimed at reunification of Cyprus....

.

It is under this name that the Organisation of Islamic Cooperation recognises the Turkish Republic of Northern Cyprus.