World's Muslims Data Set, 2012

Data Archive > International Surveys and Data > Multiple Nation Surveys > Summary


“Between October 2011 and November 2012, Pew Research Center, with generous funding from The Pew Charitable Trusts and the John Templeton Foundation, conducted a public opinion survey involving more than 30,000 face-to-face interviews in 26 countries in Africa, Asia, the Middle East and Europe. The survey asked people to describe their religious beliefs and practices, and sought to gauge respondents; knowledge of and attitudes toward other faiths. It aimed to assess levels of political and economic satisfaction, concerns about crime, corruption and extremism, positions on issues such as abortion and polygamy, and views of democracy, religious law and the place of women in society.

"Although the surveys were nationally representative in most countries, the primary goal of the survey was to gauge and compare beliefs and attitudes of Muslims. The findings for Muslim respondents are summarized in the Religion & Public Life Project’s reports The World’s Muslims: Unity and Diversity and The World’s Muslims: Religion, Politics and Society, which are available at www.pewresearch.org. […] This dataset only contains data for Muslim respondents in the countries surveyed. Please note that this codebook is meant as a guide to the dataset, and is not the survey questionnaire.” (2012 Pew Religion Worlds Muslims Codebook)

Data File
Cases: 32,604
Variables: 249
Weight Variable: WEIGHT
Data were weighted to account for differences in probability of selection. Where necessary, survey results were weighted to match the demographic characteristics of the population in each country and to account for the oversampling of Muslims. This variable does not combine all 39 countries into a single global sample that accounts for population differences. It should only be used for analyses of national populations and subgroups of national populations.
Data Collection
Date Collected: October 2011 - November 2012
Original Survey (Instrument)
2012 Pew Religion Worlds Muslims Codebook
Funded By
The Pew Charitable Trusts
The John Templeton Foundation
Collection Procedures
Results for the survey are based on face-to-face interviews conducted under the direction of the Opinion Research Business in Algeria, Iran, Iraq, Morocco and Tunisia and Princeton Survey Research Associates International in the other 21 countries. All surveys are based on national samples except in Thailand, where a sample of only Muslims was fielded in five southern provinces.
Sampling Procedures
Afghanistan
Sample design: Stratified area probability sample of all 34 Afghan provinces (excluding nomadic populations) proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Baloch, Dari, Hazara, Pashto, Uzbek
Fieldwork dates: Nov. 27-Dec. 17, 2011

Albania
Sample design: Stratified area probability sample of all three regions proportional to population size and urban/rural population. Some difficult-to-reach areas were excluded.
Mode: Face-to-face adults 18+
Languages: Albanian
Fieldwork dates: Oct. 24 – Nov. 13, 2011
Representative: Nationally representative of 98 percent of the adult population

Algeria
Sample design: Stratified area probability sample of four regions and the city of Algiers proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: French, Arabic
Fieldwork dates: Nov. 8 – Nov. 24, 2012
Representative: Nationally representative of 75 percent of the adult population. Interviews conducted in the Western region were excluded due to an administrative error.

Azerbaijan
Sample design: Stratified area probability sample of eight of 11 oblasts (excluding Upper-Karabakh, Nakhchivan and Kalbacar-Lacin) and city of Baku proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Azeri, Russian
Fieldwork dates: Dec. 4 – 22, 2011
Representative: Nationally representative of 85 percent of the adult population.

Bangladesh
Sample design: Stratified area probability sample of all seven administrative divisions proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Bangla
Fieldwork dates: Nov. 21, 2011 – Feb. 5, 2012
Representative: Nationally representative adult population

Bosnia-Herzegovina
Sample design: Stratified area probability sample of all seven regions proportional to population size and urban/rural population. In addition, an oversample of Muslims was conducted in majority-Bosniak areas. Some difficult-to-reach areas were excluded.
Mode: Face-to-face adults 18+
Languages: Bosnian, Croatian, Serbian
Fieldwork dates: Nov. 3 – Nov. 20, 2011
Representative: Nationally representative of 98 percent of the adult population

Egypt
Sample design: Stratified area probability sample of 24 of 29 governorates proportional to population size and urban/rural population. The five frontier provinces, containing 2 percent of the overall population, were excluded.
Mode: Face-to-face adults 18+
Languages: Arabic
Fieldwork dates: Nov. 14 – Dec. 18, 2011
Representative: Nationally representative of 98 percent of the adult population

Indonesia
Sample design: Stratified area probability sample of 19 provinces (excluding Papua and other remote areas and provinces with small populations) proportional to size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Bahasa Indonesian
Fieldwork dates: Oct. 28 – Nov. 19, 2011
Representative: Nationally representative of 87 percent of the adult population

Iran
Sample design: Stratified area probability sample of all nine regions proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Farsi
Fieldwork dates: Feb. 24 – May 3, 2012
Representative: Nationally representative of adult population

Iraq
Sample design: Stratified area probability sample of all 18 governorates proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Arabic, Kurdish
Fieldwork dates: Nov. 4 – Dec. 1, 2011
Representative: Nationally representative adult population

Jordan
Sample design: Stratified area probability sample of all 12 governorates proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Arabic
Fieldwork dates: Nov. 3 – Dec. 3, 2011
Representative: Nationally representative adult population

Kazakhstan
Sample design: Stratified area probability sample of all 14 oblasts proportional to population size and urban/rural population. Three districts each in Almaty oblast and East Kazakhstan were excluded due to government restrictions.
Mode: Face-to-face adults 18+
Languages: Kazakh, Russian
Fieldwork dates: Nov. 24 – Dec. 17, 2011
Representative: Nationally representative of 98 percent of the adult population

Kosovo
Sample design: Stratified area probability sample of all eight KFOR-administered regions proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Albanian, Serbian
Fieldwork dates: Dec. 16, 2011 – Jan. 20, 2012
Representative: Nationally representative of 99 percent of the adult population

Kyrgyzstan
Sample design: Stratified area probability sample of all seven oblasts and the cities of Bishkek and Osh proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Kyrgyz, Russian, Uzbek
Fieldwork dates: Jan. 31, 2012 – Feb. 25, 2012
Representative: Nationally representative of the adult population

Lebanon
Sample design: Stratified area probability sample of all seven regions (excluding areas of Beirut controlled by a militia group and a few villages in the south near the border with Israel) proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Arabic
Fieldwork dates: Nov. 14 – Dec. 8, 2011
Representative: Nationally representative of 98 percent of the adult population

Malaysia
Sample design: Stratified area probability sample of Peninsular Malaysia, East Malaysia and the Federal Territory of Kuala Lumpur. In Peninsular Malaysia and Kuala Lumpur, interviews were conducted proportional to population size and urban/rural population. A disproportionately higher number of interviews were conducted in Sarawak and Sabah states in East Malaysia to adequately cover this geographically challenging region.
Mode: Face-to-face adults 18+
Languages: Mandarin Chinese, English, Malay
Fieldwork dates: Nov. 4, 2011 – Jan. 25, 2012
Representative: Nationally representative of the adult population

Morocco
Sample design: Stratified area probability sample of 15 regions proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Arabic, French
Fieldwork dates: Nov. 3 – Dec. 1, 2011
Representative: Nationally representative of the adult population

Niger
Sample design: Stratified area probability sample of seven of eight regions (Agadez was excluded) and city of Niamey proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: French, Hausa
Fieldwork dates: Dec. 5 – Dec. 16, 2011
Representative: Nationally representative of 97 percent of the adult population

Pakistan
Sample design: Stratified area probability sample of all four provinces (excluding the Federally Administered Tribal Areas, Gilgit-Baltistan, and Azad Jammu and Kashmir for reasons of security as well as areas of instability in Khyber Pakhtunkhwa and Balochistan) proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Balochi, Hindko, Pashto, Punjabi, Sindhi, Saraiki, Urdu
Fieldwork dates: Nov. 10 – Nov. 30, 2011
Representative: Nationally representative of 82 percent of the adult population

Palestinian territories
Sample design: Stratified area probability sample of all five regions (excluding Bedouins and some communities near Israeli settlements due to military restrictions) proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Arabic
Fieldwork dates: Dec. 4, 2011 – Jan. 2, 2012
Representative: Nationally representative of 95 percent of the adult population

Russia
Sample design: Area probability sample of all 80 oblasts proportional to population. In addition, an oversample of Muslims was conducted in oblasts with a higher concentration of ethnic Muslims.
Mode: Face-to-face adults 18+
Languages: Russian
Fieldwork dates: Oct. 27 – Dec. 2, 2011
Representative: Nationally representative of 99 percent of the adult population, with a Muslim oversample

Tajikistan
Sample design: Stratified area probability sample of all four oblasts and city of Dushanbe proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Russian, Tajik
Fieldwork dates: Dec. 28, 2011 – Jan. 21, 2012
Representative: Nationally representative of 99 percent of the adult population

Thailand
Sample design: Stratified area probability sample of Muslims in the provinces of Yala, Pattani, Narathiwat, Satun and Songkhla proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Thai, Yawee
Fieldwork dates: Nov. 12, 2011 – Jan. 8, 2012
Representative: Representative of adult Muslims in five southern provinces.

Tunisia
Sample design: Stratified area probability sample of all 24 governorates proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Arabic, French
Fieldwork dates: Nov. 10 – Dec. 7, 2011
Representative: Nationally representative of the adult population

Turkey
Sample design: Stratified area probability sample of all 26 regions proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Turkish
Fieldwork dates: Nov. 18 – Dec. 19, 2011
Representative: Nationally representative of the adult population

Uzbekistan
Sample design: Stratified area probability sample of all 14 oblasts and city of Tashkent proportional to population size and urban/rural population.
Mode: Face-to-face adults 18+
Languages: Russian, Uzbek
Fieldwork dates: Feb. 2 – Feb. 12, 2012
Representative: Nationally representative of 99 percent of the adult population
Principal Investigators
James Bell, Director of International Survey Research, Pew Research Center's Forum on Religion & Public Life
Related Publications
The Pew Research Center's Forum on Religion & Public Life report: The World's Muslims: Religion, Politics and Society, April 2013 http://www.pewforum.org/2013/04/30/the-worlds-muslims-religion-politics-society-overview/

Complete summary information is available at the website:
http://www.pewforum.org/files/2013/04/worlds-muslims-religion-politics-society-full-report.pdf
http://www.pewforum.org/files/2013/04/worlds-muslims-religion-politics-society-topline1.pdf

Methodology information is available at the website:
http://www.pewforum.org/2013/04/30/the-worlds-muslims-religion-politics-society-appc/

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