Turkey entered NATO in 1952 and serves as the organization's vital eastern anchor, controlling the straits leading from the Black Sea to the Mediterranean and sharing a border with Syria, Iraq, and Iran. A NATO headquarters is located in Izmir. Besides its relationships with NATO and the EU, Turkey is a member of the OECD, the Council of Europe, and OSCE. Turkey also is a member of the UN and the Islamic Conference Organization (OIC). In December 1999, Turkey became a candidate for EU membership. On December 17, 2004, the EU decided to begin formal accession negotiations with Turkey in October 2005.

Turkey and the EU formed a customs union beginning January 1, 1996. The agreement covers industrial and processed agricultural goods. Turkey is harmonizing its laws and regulations with EU standards. Turkey adopted the EU's Common External Tariff regime, effectively lowering Turkey's tariffs for third countries, including the United States.

On October 3, 2005, Turkey and the EU reached agreement for Turkey to begin negotiations on accession to the European Union. Turkey and EU officials have begun the process of screening Turkeyís laws and policies in order to begin negotiating the individual chapters required for ultimate EU accession.

Turkey is a member of the World Trade Organization (WTO). It has signed free trade agreements with the European Free Trade Association (EFTA), Israel, and many other countries. In 1992 Turkey and 10 other regional nations formed the Black Sea Economic Cooperation Council to expand regional trade and economic cooperation.