The global traditionalist Catholic population is unknown. In the United States, however, there may be approximately one million Roman Catholics who align with traditionalist Catholicism. This estimation is based on a 2025 report by the Pew Research Center, in which 13 percent of Catholics in the United States said that they had attended a traditional Latin mass at least once in the past five years, and 2 percent said that they attended one weekly. One million is approximately 2 percent of 53 million, which is the number of adult Roman Catholics in the United States when the report was published.
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