According to the Pew Research Centers 2020 survey, the Jewish population in the United States is approximately 7.5 million, which is 2.4% of the total U.S. population. This includes 5.8 million adult Jews, which is 2.4% of all U.S. adults. Of these, 4.2 million identify as Jewish by religion, and 1.5 million identify as Jews of no religion. If one includes children living in households with a Jewish adult and who are being raised Jewish in some way, including those who are being raised both Jewish and in another religion, the total estimate of Jews of all ages in the United States is 7.5 million.

It is important to note that different studies may use different definitions of what it means to be Jewish, which can result in different population estimates. For example, if Jewish refers only to people whose religion is Jewish (Jews by religion), then the survey indicates that the Jewish population currently stands at about 1.8% of the total U.S. adult population, or 4.2 million people. If one includes secular or cultural Jews – those who say they have no religion but who were raised Jewish or have a Jewish parent and who still consider themselves Jewish aside from religion – then the estimate grows to 2.2% of American adults, or about 5.3 million. Alternatively, one could define Jewish more expansively, to include all Americans who have at least one Jewish parent or were raised Jewish, regardless of whether they now have another religion, such as Christianity. In that case, the survey suggests the total adult Jewish population (including all Jews by religion, Jews of no religion and people of Jewish background) would make up about 3.3% of American adults, or approximately 7.8 million people.