Buddhism, Islam and Religious Pluralism in South and Southeast Asia

In Thailand, Cambodia and Sri Lanka, Buddhists see strong links between their religion and country, as do Muslims in Malaysia and Indonesia

(Pew Research Center illustration; AFP via Getty Images; Getty Images)

For this report, we surveyed 13,122 adults across six countries in Asia, using nationally representative methods. Interviews were conducted face-to-face in Cambodia, Indonesia, Sri Lanka and Thailand. They were conducted on mobile phones in Malaysia and Singapore. Local interviewers administered the survey from June to September 2022, in eight languages.

This survey is part of the Pew-Templeton Global Religious Futures project, a broader effort by Pew Research Center to study religious change and its impact on societies around the world. The Center previously has conducted religion-focused surveys across sub-Saharan Africa; the Middle East-North Africa region and many countries with large Muslim populations; Latin America; Israel; Central and Eastern Europe; Western Europe; India; and the United States.

This survey includes three countries in which Buddhists make up a majority of the population (Cambodia, Sri Lanka and Thailand); two countries with Muslim majorities (Malaysia and Indonesia); and one country that is religiously diverse, with no single group forming a majority (Singapore). We also are surveying five additional countries and territories in Asia, to be covered in a future report.

To improve respondent comprehension of survey questions and to ensure all questions were culturally appropriate, Pew Research Center followed a multiphase questionnaire development process that included consultations with academic experts, as well as focus groups and in-depth interviews across several Asian countries. In addition, a pretest was conducted in each country before the national survey was fielded. The questionnaire was developed in English and translated into seven languages. Professional linguists with native proficiency independently checked the translations.

Respondents were selected using a probability-based sample design. In Thailand, this included additional interviews in the country’s Southern region, which has larger shares who are Muslim. Data was weighted to account for different probabilities of selection among respondents and to align with demographic benchmarks for each country’s adult population.

For more information, refer to the report’s Methodology section or the full survey questionnaire.

How we chose the countries in this study