Minorities in Turkey form a substantial part of the country's population, representing an estimated 25 to 28 percent of the population. Historically, in the Ottoman Empire, Islam was the official and dominant religion, with Muslims having more rights than non-Muslims, whose rights were restricted. Non-Muslim (dhimmi) ethno-religious groups were legally identified by different millet ("nations").
Following the end of World War I and the dissolution of the Ottoman Empire, all Ottoman Muslims were made part of the modern citizenry or the Turkish nation as the newly founded Republic of Turkey was constituted as a Muslim nation state. While Turkish nationalist policy viewed all Muslims in Turkey as Turks without exception, non-Muslim minority groups, such as Jews and Christians, were designated as "foreign nations" (dhimmi). Conversely, Turk (term for Muslims) was used to denote all groups in the region who had been Islamized under Ottoman rule, especially Muslim Albanians and Slavic Muslims.