In 2020, around 28.8 percent of the global population were identified as Christian. Around 25.6 percent of the global population identify as Muslims, followed by 14.9 percent of global populations as Hindu. The number of Muslims increased by 347 million, when compared to 2010 data, more than all other religions combined.

As of 2010, Christianity was the religion with the most followers worldwide, followed by Islam (Muslims) and Hinduism. In the forty years between 2010 and 2050, it is projected that the landscape of world religions will undergo some noticeable changes, with the number of Muslims almost catching up to Christians. The changes in population sizes of each religious group is largely dependent on demographic development, for example, the rise in the world's Christian population will largely be driven by population growth in Sub-Saharan Africa, while Muslim populations will rise across various regions of Africa and South Asia. As India's population is set to grow while China's goes into decline, this will be reflected in the fact that Hindus will outnumber the unaffiliated by 2050. In fact, India may be home to both the largest Hindu and Muslim populations in the world by the middle of this century.

This statistic shows the share of world Christian population by selected countries worldwide in 2010. 11.3 percent of all Christians worldwide were living in the United States in 2010.

Christianity is the major religion in numerous African countries. As of 2024, around 96 percent of the population of Zambia was Christian, representing the highest percentage on the continent. Seychelles and Rwanda followed with roughly 95 percent and 94 percent of the population being Christian, respectively. While these countries present the highest percentages, Christianity was also prevalent in many other African nations. For instance, in South Africa, Christianity was the religion of nearly 85 percent of the people, while the share corresponded to 71 percent in Ghana. Religious variations across Africa Christianity and Islam are the most practiced religions in Africa. Christian adherents are prevalent below the Sahara, while North Africa is predominantly Muslim. In 2020, Christians accounted for around 60 percent of the Sub-Saharan African population, followed by Muslims with a share of roughly 30 percent. In absolute terms, there were approximately 650 million Christians in the region, a number forecast to increase to over one billion by 2050. In contrast, Islam is most prevalent in North Africa, being the religion of over 90 percent of the population in Algeria, Morocco, Tunisia, and Libya. Christianity in the world As opposed to other religions, Christianity is widely spread across continents worldwide. In fact, Sub-Saharan Africa, Latin America and the Caribbean, and Europe each account for around 25 percent of the global Christian population. By comparison, Asia-Pacific and North America make up 13 percent and 12 percent of Christians worldwide, respectively. In several regions, Christians also suffer persecution on religious grounds. Somalia and Libya presented the most critical situation in Africa in 2021, reporting the strongest suppression of Christians worldwide just after North Korea and Afghanistan.

Poland: Christians as percent of the total population: The latest value from 2013 is 98.5 percent, an increase from 98.3 percent in 2012. In comparison, the world average is 51.1 percent, based on data from 145 countries. Historically, the average for Poland from 1960 to 2013 is 94.3 percent. The minimum value, 89.9 percent, was reached in 1960 while the maximum of 98.5 percent was recorded in 2013.

The USA: Christians as percent of the total population: The latest value from 2013 is 76 percent, a decline from 76.3 percent in 2012. In comparison, the world average is 51.1 percent, based on data from 145 countries. Historically, the average for the USA from 1960 to 2013 is 82.8 percent. The minimum value, 76 percent, was reached in 2013 while the maximum of 89.6 percent was recorded in 1960.

Spain: Christians as percent of the total population: The latest value from 2013 is 88.8 percent, a decline from 89.3 percent in 2012. In comparison, the world average is 51.1 percent, based on data from 145 countries. Historically, the average for Spain from 1960 to 2013 is 95.9 percent. The minimum value, 88.8 percent, was reached in 2013 while the maximum of 98.9 percent was recorded in 1960.

This statistic shows the top 25 countries in the world with the largest number of Christian population in 2010. In 2010, the United States was leading the ranking with about 243 million Christians living in the country.

The World Religion Project (WRP) aims to provide detailed information about religious adherence worldwide since 1945. It contains data about the number of adherents by religion in each of the states in the international system. These numbers are given for every half-decade period (1945, 1950, etc., through 2010). Percentages of the states' populations that practice a given religion are also provided. (Note: These percentages are expressed as decimals, ranging from 0 to 1, where 0 indicates that 0 percent of the population practices a given religion and 1 indicates that 100 percent of the population practices that religion.) Some of the religions are divided into religious families. To the extent data are available, the breakdown of adherents within a given religion into religious families is also provided.

The project was developed in three stages. The first stage consisted of the formation of a religion tree. A religion tree is a systematic classification of major religions and of religious families within those major religions. To develop the religion tree we prepared a comprehensive literature review, the aim of which was (i) to define a religion, (ii) to find tangible indicators of a given religion of religious families within a major religion, and (iii) to identify existing efforts at classifying world religions. (Please see the original survey instrument to view the structure of the religion tree.) The second stage consisted of the identification of major data sources of religious adherence and the collection of data from these sources according to the religion tree classification. This created a dataset that included multiple records for some states for a given point in time. It also contained multiple missing data for specific states, specific time periods and specific religions. The third stage consisted of cleaning the data, reconciling discrepancies of information from different sources and imputing data for the missing cases.

The National Religion Dataset: The observation in this dataset is a state-five-year unit. This dataset provides information regarding the number of adherents by religions, as well as the percentage of the state's population practicing a given religion.

Population: Religion: Female: Taoism data was reported at 165.600 Person th in 2015. This records a decrease from the previous number of 172.222 Person th for 2010. Population: Religion: Female: Taoism data is updated yearly, averaging 165.600 Person th from Jun 2000 (Median) to 2015, with 3 observations. The data reached an all-time high of 172.222 Person th in 2010 and a record low of 105.267 Person th in 2000. Population: Religion: Female: Taoism data remains active status in CEIC and is reported by Department of Statistics. The data is categorized under Global Database’s Singapore – Table SG.G002: Population by Religion .

Germany: Christians as percent of the total population: The latest value from 2013 is 71.4 percent, a decline from 71.8 percent in 2012. In comparison, the world average is 51.1 percent, based on data from 145 countries. Historically, the average for Germany from 1960 to 2013 is 83.1 percent. The minimum value, 71.4 percent, was reached in 2013 while the maximum of 95.1 percent was recorded in 1960.

Colombia: Christians as percent of the total population: The latest value from 2013 is 94.1 percent, unchanged from 94.1 percent in 2012. In comparison, the world average is 51.1 percent, based on data from 145 countries. Historically, the average for Colombia from 1960 to 2013 is 94.2 percent. The minimum value, 94.1 percent, was reached in 1989 while the maximum of 94.3 percent was recorded in 1960.

Turkey: Christians as percent of the total population: The latest value from 2013 is 0.2 percent, unchanged from 0.2 percent in 2012. In comparison, the world average is 51.1 percent, based on data from 145 countries. Historically, the average for Turkey from 1960 to 2013 is 0.4 percent. The minimum value, 0.2 percent, was reached in 2001 while the maximum of 0.7 percent was recorded in 1960.

From 2022 to 2060, the worldwide population of Muslims is expected to increase by 45.7 percent. For the same period, the global population of Buddhists is expected to decrease by 12.2 percent.

This Religion and State-Minorities (RASM) dataset is supplemental to the Religion and State Round 2 (RAS2) dataset. It codes the RAS religious discrimination variable using the minority as the unit of analysis (RAS2 uses a country as the unit of analysis and, is a general measure of all discrimination in the country). RASM codes religious discrimination by governments against all 566 minorities in 175 countries which make a minimum population cut off. Any religious minority which is at least 0.25 percent of the population or has a population of at least 500,000 (in countries with populations of 200 million or more) are included. The dataset also includes all Christian minorities in Muslim countries and all Muslim minorities in Christian countries for a total of 597 minorities. The data cover 1990 to 2008 with yearly codings.

These religious discrimination variables are designed to examine restrictions the government places on the practice of religion by minority religious groups. It is important to clarify two points. First, these variables focus on restrictions on minority religions. Restrictions that apply to all religions are not coded in this set of variables. This is because the act of restricting or regulating the religious practices of minorities is qualitatively different from restricting or regulating all religions. Second, this set of variables focuses only on restrictions of the practice of religion itself or on religious institutions and does not include other types of restrictions on religious minorities. The reasoning behind this is that there is much more likely to be a religious motivation for restrictions on the practice of religion than there is for political, economic, or cultural restrictions on a religious minority. These secular types of restrictions, while potentially motivated by religion, also can be due to other reasons. That political, economic, and cultural restrictions are often placed on ethnic minorities who share the same religion and the majority group in their state is proof of this.

This set of variables is essentially a list of specific types of religious restrictions which a government may place on some or all minority religions. These variables are identical to those included in the RAS2 dataset, save that one is not included because it focuses on foreign missionaries and this set of variables focuses on minorities living in the country. Each of the items in this category is coded on the following scale:

0. The activity is not restricted or the government does not engage in this practice.
1. The activity is restricted slightly or sporadically or the government engages in a mild form of this practice or a severe form sporadically.
2. The activity is significantly restricted or the government engages in this activity often and on a large scale.

A composite version combining the variables to create a measure of religious discrimination against minority religions which ranges from 0 to 48 also is included.

ARDA Note: This file was revised on October 6, 2017. At the PIs request, we removed the variable reporting on the minority's percentage of a country's population after finding inconsistencies with the reported values. For detailed data on religious demographics, see the "/data-archive?fid=RCSREG2" Target="_blank">Religious Characteristics of States Dataset Project.

Census: Population: by Religion: Christian: Tripura data was reported at 159,882.000 Person in 03-01-2011. This records an increase from the previous number of 102,489.000 Person for 03-01-2001. Census: Population: by Religion: Christian: Tripura data is updated decadal, averaging 131,185.500 Person from Mar 2001 (Median) to 03-01-2011, with 2 observations. The data reached an all-time high of 159,882.000 Person in 03-01-2011 and a record low of 102,489.000 Person in 03-01-2001. Census: Population: by Religion: Christian: Tripura data remains active status in CEIC and is reported by Office of the Registrar General & Census Commissioner, India. The data is categorized under India Premium Database’s Demographic – Table IN.GAE004: Census: Population: by Religion: Christian.

Croatia: Christians as percent of the total population: The latest value from 2013 is 95.8 percent, an increase from 95.5 percent in 2012. In comparison, the world average is 51.1 percent, based on data from 145 countries. Historically, the average for Croatia from 1991 to 2013 is 92.1 percent. The minimum value, 87.7 percent, was reached in 1991 while the maximum of 95.8 percent was recorded in 2013.

Indonesia: Christians as percent of the total population: The latest value from 2013 is 8.7 percent, unchanged from 8.7 percent in 2012. In comparison, the world average is 51.1 percent, based on data from 145 countries. Historically, the average for Indonesia from 1960 to 2013 is 8.9 percent. The minimum value, 8.7 percent, was reached in 2009 while the maximum of 9 percent was recorded in 1960.

The RCS-Dem dataset reports estimates of religious demographics, both country by country and region by region. RCS was created to fulfill the unmet need for a dataset on the religious dimensions of countries of the world, with the state-year as the unit of observation. It covers 220 independent states, 26 selected substate entities, and 41 geographically separated dependencies, for every year from 2015 back to 1900 and often 1800 (more than 42,000 state-years). It estimates populations and percentages of adherents of 100 religious denominations including second level subdivisions within Christianity and Islam, along with several complex categories such as "Western Christianity." RCS is designed for easy merger with datasets of the Correlates of War and Polity projects, datasets by the United Nations, the Religion And State datasets by Jonathan Fox, and the ARDA national profiles.

The USA: Catholic Christians as percent of the total population: The latest value from 2013 is 24 percent, unchanged from 24 percent in 2012. In comparison, the world average is 43.2 percent, based on data from 84 countries. Historically, the average for the USA from 1960 to 2013 is 24 percent. The minimum value, 23.9 percent, was reached in 1960 while the maximum of 24 percent was recorded in 1983.