Q&A: How Pew Research Center estimates the number of unauthorized immigrants living in the U.S.
In this Q&A, we speak with Senior Demographer Jeffrey S. Passel about how the Center estimates the number of unauthorized immigrants in the U.S.
Numbers, Facts and Trends Shaping Your World
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Methodology
For our latest survey data about news influencers, read the “News Influencers Fact Sheet.” This report – a study of popular news influencers – uses three different research components and methodologies, including a nationally representative survey of U.S. adults conducted through Pew Research Center’s American Trends Panel (ATP), as well as an analysis of news influencers […]
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Appendix E: Updated unauthorized immigrant population estimates for Europe and the United Kingdom, 2014-2017
Editorial note to readers (March 19, 2025): This project estimated the number of unauthorized immigrants living in 32 European countries during the mid- to late-2010s. We used what were then the best available data sources from different governments and from the European Union. After our report was published in November 2019, researchers at the University […]
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data essay
Global Elections in 2024: What We Learned in a Year of Political Disruption
Voters in more than 60 countries went to the polls in what turned out to be a difficult year for incumbents and traditional political parties.
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Americans’ trust in information from news outlets, social media
Plus, Trump pushes back against fact-checking
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5. Religious switching into and out of Hinduism
Find out what percentage of adults have joined or left Hinduism, or remained Hindu since childhood, in four countries.
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6. Religious switching into and out of Judaism
Find out what percentage of adults have joined or left Judaism, or remained Jewish since childhood, in the U.S. and Israel.
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short reads
Religion and spirituality among LGBT Americans
48% of U.S. adults who are LGBT say they identify with a religion, describing themselves as Christian, Jewish, Muslim or an adherent of another religion.
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Methodology
The American Trends Panel survey methodology Overview Data in this report comes from Wave 177 of the American Trends Panel (ATP), Pew Research Center’s nationally representative panel of randomly selected U.S. adults. The survey was conducted from Aug. 18 to 24, 2025. A total of 5,153 panelists responded out of 5,525 who were sampled, for […]
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How the Global Religious Landscape Changed From 2010 to 2020
Christians remain the largest religious group, and Muslims grew the fastest from 2010 to 2020. Read how the global share of Buddhists, Hindus, Jews and the religiously unaffiliated changed.
