about 347 million more
About how many more Muslims were there worldwide in 2020 compared with 2010?
Meanwhile Buddhists were the only major group to see an absolute decline over the same decade.
Source: Pew Research Center (2020) pewresearch.org
Society · Guess the stat
Guess the real numbers behind the world's Muslim population, see how everyone else guessed, and get the source.
About what share of US Muslim adults were born outside the United States?

Guess, see the crowd, get the real number. One ranked attempt per day.
Real figures with their sources. All Muslim facts →
about 347 million more
Meanwhile Buddhists were the only major group to see an absolute decline over the same decade.
Source: Pew Research Center (2020) pewresearch.org
Asia-Pacific (about 1.2 billion)
Countries like Indonesia and Pakistan give the Asia-Pacific region the world's largest Muslim populations.
Source: Pew Research Center (2020) pewresearch.org
about 3.45 million
That estimate includes Muslims of all ages living across the country.
Source: Pew Research Center (2017) pewresearch.org
Vote to see the live results. All polls → · Put these polls on your site or newsletter →
Earned on any site in the network, shown on your profile everywhere.
Played a round? Add your email to keep your level, streak and badges on any device and every site in the network. We send a 6-digit code to confirm it's you.
A surprising, sourced Muslims worldwide and in the United States — population, growth and demographics number and that week's poll, in your inbox every Monday. Free, and you can stop any time.
Put your brand in front of people who care about Muslims worldwide and in the United States — population, growth and demographics, ask them a question, and get the anonymous answers. See this site's live numbers →
Each question asks you to guess a real number about Muslims worldwide and in the United States — population, growth and demographics. After you answer you see how everyone else guessed, then the real figure and where it comes from.
Four stats and one opinion poll. A correct guess earns 100 points plus up to 50 for speed, with a combo bonus for answers in a row. The range next to the right answer earns 40. Opinion polls earn 25 for having your say, and nailing every stat adds 150.
Every stat links to its source, such as government statistics agencies, research organizations and industry groups. Figures are checked against the source before they go live.
Yes. Playing, streaks, badges and leaderboards are free, and your votes stay anonymous.