Islam constitutes the third-largest religion in Singapore, after Buddhism and Christianity. Muslims account for approximately 15.6% of the population, as indicated by the 2020 census. Singaporean Muslims are predominantly Sunni adhering to either the Shafi‘i or Hanafi schools of thought. The majority of Muslims, about 80%, are ethnic Malays, while 13% are of Indian descent; the remaining fraction comprises local Chinese, Eurasian, and Arab communities, in addition to foreign migrants.
Cultural Muslims, also known as nominal Muslims, non-practicing Muslims or non-observing Muslims, are people who identify as Muslim but are not religious. They may variously be non-observing, secular, irreligious, or individuals who still identify with Islam due to belief, sprituality, family backgrounds, personal experiences, ethnic and national heritage, or the social and cultural environment in which they grew up.
Cultural Muslims can be found across the world, but especially in the Balkans, Central Asia, Europe, the Maghreb, various countries in South Asia and West Asia, Russia, Turkey, Singapore, Malaysia, Indonesia and the United States. In several countries and regions, self-reported Muslims practice the religion at low levels, and for some, their "Muslim" identity is associated with cultural or ethnic or national heritage, rather than merely religious faith.
As of June 2025, the population of Singapore stood at 6.11 million. Of these 6.11 million, 4.20 million are residents, consisting of about 3.66 million citizens and 540,000 permanent residents (PRs). The remaining 1.91 million people living in Singapore are classed as non-residents, defined as "foreign workforce acrossall pass types, dependants and international students".
Singapore is a multi-racial, multi-ethnic and multi-cultural society. Major religions include Buddhism, Christianity, Islam, Taoism and Hinduism. Its population is broadly classified under the CMIO system: Chinese, Malay, Indian and Other. While Malays are recognised as the indigenous community, 75.5 percent of citizens and permanent residents are ethnic Chinese, with Malays and Indians making up 15.1 and 7.6 percent respectively. These three groups make up 98.2 percent of the ethnic citizen population, while the remaining 1.8 percent, categorised as Other, are largely Eurasians. Non-residents, who make up 29 percent of the overall population, are excluded from resident statistics. Officially, mixed-race Singaporeans are typically assigned their father's race, though their identity card may also reflect both parents' ethnicities.
Christians in Singapore constitute 19% of the country's resident population, as of the most recent census conducted in 2020. Christianity is the second largest religion in the country, after Buddhism and before Islam. In 2020, about 37.1% of the country's Christians identified as Catholic with 62.9% labeled as 'Other Christians', most of which identify as Protestant, with some identifying as Orthodox or other minority Christian denominations.
Christianity was first introduced to Singapore by Anglicans, who were among the first British settlers to arrive shortly after the founding of a British colony by Stamford Raffles. The proportion of Christians among Singaporeans has increased in the last few decades: 9.9% in 1980; 12.7% in 1990; 14.6% in 2000 and 18.9% in 2020. A growing number of Singaporeans are converting to the faith or were born into Christian families.