There is no official government count, since the US Census does not ask about religion. Here is what the leading estimates actually say, and why they differ.
How Many Muslims Live in the United States Today?
Estimates place the US Muslim population between roughly 3.45 million and 4.5 million, depending on the source and methodology used, since there is no single official government figure. Pew Research Center's survey-based estimate has put the number at around 3.45 million, or about 1.1% of the US population. The 2020 US Religion Census, which relies on counts submitted by mosques and Islamic organizations rather than household surveys, puts the figure closer to 4.45 million.
Why Is There No Single Official Count?
The US Census Bureau does not ask questions about religion, so every Muslim population figure in the United States is an estimate built from surveys, mosque counts, or demographic modeling rather than a direct government count. This is why different, credible sources can report meaningfully different numbers for the same year: a phone survey captures people who identify as Muslim regardless of mosque attendance, while a religious-organization count captures people connected to a registered mosque or Islamic center, and those two groups do not fully overlap.
Where Are US Muslim Communities Concentrated?
Muslim communities in the United States are concentrated in and around major metro areas, particularly New York City, Chicago, Houston, the Detroit and Dearborn area, and Los Angeles, though smaller communities exist in nearly every state. Dearborn, Michigan is often cited as home to one of the highest concentrations of Arab-American Muslims anywhere in the country. This concentration matters for access to in-person Islamic institutions: a family in one of these metro areas has meaningfully more local options than a family in a smaller city with a single, smaller Islamic center.
How Is the Muslim Population Expected to Change?
Demographic projections from Pew Research Center suggest the US Muslim population will continue to grow through immigration, higher relative birth rates, and the aging of a large existing young Muslim population, roughly doubling as a share of the country by mid-century. Growth of this kind increases demand for Islamic education infrastructure, including Quran teachers, faster than new mosques and full-time Islamic schools can typically be built, which is part of why online one-on-one Quran classes have grown as a practical option for many US families, including homeschooling households and new Muslims building Quran study into their routine for the first time.
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