Turkish Constitution of 1924 in the context of "1960 Turkish coup d'état"

In Turkey, secularism or laicism (see laïcité) was first introduced with the 1928 amendment of the Constitution of 1924, which removed the provision declaring that the "Religion of the State is Islam", and with the later reforms of Turkey's first president Mustafa Kemal Atatürk, which set the administrative and political requirements to create a modern, democratic, secular state, aligned with Kemalism.

Nine years after its introduction, laïcité was explicitly stated in the second article of the then Turkish constitution on 5 February 1937. The current Constitution of 1982 neither recognizes an official religion nor promotes any.

Religion in Turkey consists of various religious beliefs. While Turkey is officially a secular state, numerous surveys all show that Islam is the country's most common religion. According to the state, 99.8% of the population is initially registered as Muslim. The remaining 0.2% are Christians and adherents of other officially recognised religions such as Judaism. However, because the government registers everyone as Muslim at birth by default, the official statistics can be misleading. There are many people who follow other religions or do not adhere to any religion, yet they are officially classified as 'Muslim' in official records unless they make a contrary claim. These records can be changed or even blanked out on the request of the citizen using a valid electronic signature to sign the electronic application. According to a 2025 report from Pew Research Center, 95% of Turkey self-identified as Muslim. A significant percentage of those are non-observing Cultural Muslims.

Turkey has officially been a secular country since its 1924 constitution was amended in 1928. This was later strengthened and entrenched with the wider appliance of laicism by founder Atatürk during the mid-1930s, as part of the Republican reforms. Strict regulations on religion, including a ban on Islamic attire, were imposed. The rights of Armenian Apostolic, Greek Orthodox, and Jewish citizens were recognized under the Treaty of Lausanne.

The Constitution of 1961, officially titled the Constitution of the Republic of Turkey (Turkish: Türkiye Cumhuriyeti Anayasası), was the fundamental law of Turkey from 1961 to 1982. It was introduced following the 1960 coup d'état, replacing the earlier Constitution of 1924. It was approved in a referendum held on 9 July 1961, with 61.7% of the nation voting in favor. It remained in force until the 1980 coup d'état, following which it was replaced by a new document, the Constitution of 1982, which remains in force today.

The Constitution of 1921 (Ottoman Turkish: تشکیلات اساسييه قانونى, romanized: Teşkilât-i Esasiyye Kanunu; Turkish: 1921 Türk Anayasası) was the fundamental law of Turkey for a brief period from 1921 to 1924. The first constitution of the modern Turkish state, it was ratified by the Grand National Assembly of Turkey in January 1921. It was a simple document consisting of only 23 short articles. In October 1923 the constitution was amended to declare Turkey to be a republic. In April the following year the constitution was replaced by an entirely new document, the Constitution of 1924.

The headscarf controversy in Turkey was a 20th and early 21st century controversy about women wearing Islamic headscarves. The Republic of Turkey had been a secular state since the constitutional amendment of 1937. Mustafa Kemal Atatürk introduced the secularization of the state in the Turkish Constitution of 1924, alongside his reforms. The suppression of hijab/headscarves and other prominent religious symbols in government institutions and public schools, (similar to policies in France, Quebec and Mexico) led to heated controversy at times in Turkey. Specifically, it resulted in a clash between those favoring the secular principles of the state, such as the Turkish Armed Forces, and religious conservatives, including Islamists. In the early 21st century, the Justice and Development Party (AKP) and its leader Recep Tayyip Erdoğan reversed this, and worked to "raise a pious generation" in Turkey, which in turn created a backlash, even lowering the religiosity among the youth.

Between 80 and 90% of Turkey is Muslim, whilst a significant portion of them are Cultural Muslims. The use of veil is 40 to 50% of women in general, while only 35% of the young women are veiling.

Turkish coup d'état may refer to illegal or constitutional military takeovers or takeover attempts in Turkey. There have been several.

From the founding of the Turkish Republic until 2016, the Turkish military was very involved in Turkish politics. The army was strongly Kemalist and considered one of its roles to be the ultimate guardian of Atatürk's reforms including secularism, and of cooperation with the Western world generally. The Turkish constitutions of 1924, 1961, and 1982 formally specified that the army's role was to protect Turkey against internal as well as external threats. The army was popular and prestigious as the guarantor of the Turkish state and of Turkish multiparty democracy (after its effective establishment following World War II).

Atatürk's Principles consist of six principles that determine the pragmatic policies of Turkey's first president, Mustafa Kemal Atatürk, which he put into effect under his administration. These principles came to be the fundamental pillars of the Republican People's Party, the founding and sole party of the country, on 13 May 1935. Later, the principles were added to the 1924 Constitution with a law enacted in 1937 and thus became the national ideology of Turkey with this practice.