A produced by The World in Maps categorises these nations by their official or constitutionally endorsed faiths — Christianity (in red), Islam (in green), and Buddhism (in dark grey) — pointing to the enduring complexity of how states and religions interact globally.

What a “state religion” means and how it varies

A state religion (also called an official or established religion) is one that a government formally endorses or gives special status, privileges, or constitutional recognition. But this does not necessarily mean the state is a theocracy or that it compels all citizens to follow that faith.

In many nations, religious freedom still exists, albeit within a framework where the “official” religion enjoys preferential treatment , whether in funding, influence over ceremonial functions, or constitutional prominence.

This landscape is diverse in practice. Some states explicitly define their religion in their constitutions, others make public references, or provide institutional support.

For instance, Jordan’s constitution states that “Islam is the religion of the State” while still permitting other faiths to be practised.

Malaysia’s federal constitution similarly affirms Islam as the religion of the federation, though it allows other religions to be practised peacefully.

Where state religions persist, and which ones

The map shows a concentration of state religions in parts of the Middle East, Southeast Asia , and parts of Europe and Africa.

Islamic state religions are particularly frequent: countries like Saudi Arabia, Malaysia, Jordan, Kuwait, and others have Islam as the constitutionally recognised religion.

In the sphere of Buddhism, a few nations (such as Bhutan and Cambodia) declare Buddhist identity in their constitutions as a “spiritual heritage” or state faith.

In Europe, some countries maintain established Christian churches (e.g. the Church of Denmark), though the practical role of these churches varies, and secularisation trends are strong.

It’s also worth noting that many more countries, beyond those with formal state religions, still favour one religion through policy, funding or cultural entanglement. According to Pew , over 80 nations give official or unofficial advantages to particular faiths.

According to the 2020 U.S. Religion Census , Islam ranks as the second largest religion in the majority of states, including California, Texas, New York, and Florida, reflecting the growth of Muslim communities in both urban and suburban areas.

Judaism claims the second spot in several key states like New Jersey, Massachusetts , and Maryland, thanks to historically strong Jewish communities, especially in the Northeast.

Buddhism emerges as the second-largest religion in states like Montana, Idaho, and New Mexico, where immigration and refugee resettlement programs have contributed to vibrant Buddhist communities.

Hinduism holds the second position in Delaware, while the Bahá’í faith is the second largest in South Dakota—an interesting reflection of the smaller, but committed, religious minorities in those states.

The 2020 Religion Census compiled data from denominational reports, surveys, and community records, making it one of the most comprehensive religion surveys in the U.S. The patterns it reveals underscore the interplay of immigration, cultural heritage, and socio-economic dynamics in shaping America ’s religious makeup.

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