The Kingdom of Saudi Arabia is an Islamic absolute monarchy in which Sunni Islam is the official state religion based on firm Sharia law. Non-Muslims must practice their religion in private and are vulnerable to discrimination and arrest.US State Dept 2022 report While no law requires all citizens to be Muslim, non-Muslim foreigners attempting to acquire Saudi Arabian nationality must convert to Islam. Children born to Muslim fathers are by law deemed Muslim.

Religious freedom is not provided for under the law. The government does not provide legal recognition or protection for freedom of religion, and it is severely restricted in practice. As a matter of policy, the government guarantees and protects the right to private worship for all, including non-Muslims who gather in homes for religious practice; however, this right is not respected in practice and is not defined in law.

The Saudi Mutaween (), also known as the Committee for the Promotion of Virtue and the Prevention of Vice (CPVPV) or "religious police" was enforcing the prohibition on the public practice of non-Muslim religions, though its powers were significantly curtailed in April 2016. Sharia applies to all people inside Saudi Arabia, regardless of religion.

Religious demography

The country's total land area is about 2,150,000 sq kilometers and in 2022 the population was about 34 million, of whom approximately 19 million were citizens. Comprehensive statistics for the religious denominations of foreigners are not available, but estimated figures in a US State Department report for 2022 show approximately 31.5 million Muslims from the various branches and schools of Islam, 2.1 million Christians (including Eastern Orthodox, Protestants, and Roman Catholics), 708,000 Hindus, 114,000 Buddhists, approximately 67,000 Sikhs, and 242,000 atheists.

Accurate religious demographics of citizens are difficult to obtain. A majority of Saudi citizens identify as Sunni Muslim. A minority of citizens are Shia Muslims. In 2006, they formed around 15% of the native population. They live mostly in the eastern districts on the Persian Gulf (Qatif, Al-Hasa, Dammam), where they constitute approximately three-quarters of the native population, and in the western highlands of Arabia (districts of Jazan, Najran, Asir, Medina, Ta'if, and Hijaz).

Status of religious freedom Saudi Arabia is an Islamic theocracy and the government has declared the Qur'an and the Sunnah (tradition) of Muhammad to be the country's Constitution. Proselytizing for religions other than Islam is illegal. Islam is the official religion. Under the law, children born to Muslim fathers are also Muslim, regardless of the country or the religious tradition in which they have been raised. The government prohibits the public practice of other religions but generally allows private practice of non-Muslim religions. The primary source of law in Saudi Arabia is based on Sharia (Islamic law), with Shari'a courts basing their judgments largely on a code derived from the Qur'an and the Sunnah. Additionally, traditional tribal law and custom remain significant.

The only national holidays observed in Saudi Arabia are the two Eids, Eid Al-Fitr at the end of Ramadan and Eid Al-Adha at the conclusion of the Hajj and the Saudi national day. Contrary practices, such as celebrating Maulid Al-Nabi (birthday of Muhammad) and visits to the tombs of renowned Muslims, are forbidden, although enforcement was more relaxed in some communities than in others, and Shi'a were permitted to observe Ashura publicly in some communities.

Restrictions on religious freedom Islamic practice generally is limited to that of a school of the Sunni branch of Islam as interpreted by Muhammad ibn Abd al Wahhab, an 18th-century Arab religious scholar. Outside Saudi Arabia, this branch of Islam is often referred to as "Wahhabi," a term the Saudis do not use.

Practices contrary to this interpretation, such as celebration of Muhammad's birthday and visits to the tombs of renowned Muslims, are discouraged. The spreading of Muslim teachings not in conformity with the officially accepted interpretation of Islam is prohibited. Writers and other individuals who publicly criticize this interpretation, including both those who advocate a stricter interpretation and those who favor a more moderate interpretation than the government's, have reportedly been imprisoned and faced other reprisals.

The Ministry of Islamic Affairs supervises and finances the construction and maintenance of almost all mosques in the country, although over 30% of all mosques in Saudi Arabia are built and endowed by private persons. The Ministry pays the salaries of imams (prayer leaders) and others who work in the mosques. A governmental committee defines the qualifications of imams. The CPVPV, "religious police", or Mutawwa'in is a government entity, and its chairman has ministerial status. The Committee sends out armed and unarmed people into the public to ensure that Saudi citizens and expatriates living in the kingdom follow the Islamic mores, at least in public.

Saudi law prohibits alcoholic beverages and pork products in the country as they are considered to be taboo in Islam, even though both can be consumed if Muslims are starving or dying of thirst. Those violating the law are handed harsh punishments. Drug trafficking is always punished by death.

Under Saudi law conversion by a Muslim to another religion is considered apostasy, a crime punishable by death. In March 2014, the Saudi interior ministry issued a royal decree branding all atheists as terrorists, which defines terrorism as "calling for atheist thought in any form, or calling into question the fundamentals of the Islamic religion on which this country is based."

Non-Muslims are strictly prohibited by Saudi Arabia from entering the Holy City of Mecca. However, the ban on visiting Medina, Islam's second holiest city, was lifted in 2023, allowing non-Muslims to enter the city—though access to the Prophet's Mosque remains restricted. On highways, religious police officers may divert them or hand out a fine. In the cities themselves, road checks are randomly conducted.

Saudi Arabia prohibits public non-Muslim religious activities. Non-Muslim worshipers risk arrest, imprisonment, lashing, deportation, and sometimes torture for engaging in overt religious activity that attracts official attention. In July 2012 the Bodu Bala Sena, an extremist Buddhist organization based in Sri Lanka, reported that Premanath Pereralage Thungasiri, a Sri Lankan Buddhist employed in Saudi Arabia, had been arrested for worshiping the Buddha in his employer's home, and that plans were being made to behead him. The Sri Lankan Embassy has rejected these reports. In the past, Sri Lankan officials have also rejected reports regarding labor conditions issued by New York-based Human Rights Watch.

The government has stated publicly, including before the U.N. Committee on Human Rights in Geneva, that its policy is to protect the right of non-Muslims to worship privately. However, non-Muslim organizations have claimed that there are no explicit guidelines for distinguishing between public and private worship, such as the number of persons permitted to attend and the types of locations that are acceptable. Such lack of clarity, as well as instances of arbitrary enforcement by the authorities, obliges most non-Muslims to worship in such a manner as to avoid discovery. Those detained for non-Muslim worship almost always are deported by authorities after sometimes lengthy periods of arrest during investigation. In some cases, they also are sentenced to receive lashes prior to deportation.

In 2022, there were no religious-worker visas, but non-Muslim clergy were able to enter the country to work in their communities. They were also able to bring in religious items, including books.

Proselytizing by non-Muslims, including the distribution of non-Muslim religious materials such as Bibles, is illegal. Muslims or non-Muslims wearing religious symbols of any kind in public risk confrontation with the Mutawwa'in. In 2001, the Ministry of Islamic Affairs ran approximately 50 "Call and Guidance" centers employing approximately 500 persons work to convert foreigners to Islam. Some non-Muslim foreigners convert to Islam during their stay in the country. The press often carries articles about such conversions, including testimonials. The press as well as government officials publicized the conversion of the Italian Ambassador to Saudi Arabia, Torquato Cardilli, in late 2001.

The government requires noncitizen residents to carry a Saudi residence permit (Iqama) for identification in place of their passports. Among other information, these contain a religious designation for "Muslim" or "non-Muslim."

Members of the Shi’a minority are the subjects of officially sanctioned political and economic discrimination. The authorities permit the celebration of the Shi’a holiday of Ashura in the eastern province city of Qatif. No other Ashura celebrations are permitted in the country, and many Shi’a travel to Qatif or to Bahrain to participate in Ashura celebrations.

Shi’a have declined government offers to build state-supported mosques because they fear the government would prohibit the incorporation and display of Shi’a motifs in any such mosques. The government seldom permits private construction of Shi’a mosques. During 2013, virtually all existing mosques in al-Ahsa were unable to obtain licenses and faced the threat of closure at any time and in other parts of the country were not allowed to build Shia-specific mosques.

In 2022, the government executed 81 men, including 41 Saudi Shia, in the largest known mass execution carried out in the kingdom's history.

Members of the Shi’a minority are discriminated against in government employment, especially with respect to positions that relate to national security, such as in the military or in the Ministry of the Interior. The government restricts employment of Shi’a in the oil and petrochemical industries. The government also discriminates against Shi’a in higher education through unofficial restrictions on the number of Shi’a admitted to universities. This discrimination has been noted for many years.

Under the provisions of Shari’a law as practiced in the country, judges may discount the testimony of people who are not practicing Muslims or who do not adhere to the official interpretation of Islam. Legal sources report that testimony by Shi’a is often ignored in courts of law or is deemed to have less weight than testimony by Sunnis. Sentencing under the legal system is not uniform. Laws and regulations state that defendants should be treated equally; however, under Shari’a as interpreted and applied in the country, crimes against Muslims may result in harsher penalties than those against non-Muslims. Information regarding government practices was generally incomplete because judicial proceedings usually were not publicized or were closed to the public, despite provisions in the criminal procedure law requiring court proceedings to be open.

In the past Customs officials have regularly opened postal material and cargo to search for non-Muslim materials, such as Bibles and religious videotapes; such materials have been subject to confiscation.

Sunni Islamic religious education is mandatory in public schools at all levels. Private schools must also teach the same curriculum, except for private international schools which must teach Islamic studies. In 2022 the government reduced the number of hours required for religious education, in favor of more study time for Arabic and STEM.

In 2007, Saudi religious police detained Shiite pilgrims participating in the Hajj and Umrah pilgrimage, allegedly calling them "infidels in Mecca and Medina".