The U.S. government estimates the total population at 126 million (July 2018 estimate).  According to the 2010 census, approximately 83 percent identify as Catholic, 5 percent evangelical Protestant, 1.6 percent Pentecostal, 1.4 percent Jehovah’s Witnesses, and 0.5 percent Jewish.  Other religious groups include The Church of Jesus Christ of Latter-day Saints and Muslims.  More than 2 percent of the population reports practicing a religion not otherwise specified, and nearly 5 percent reports not practicing any religion.  Some indigenous persons adhere to syncretic religions drawing from indigenous beliefs.

Official statistics based on self-identification during the 2010 census sometimes differ from the membership figures stated by religious groups.  Approximately 315,000 individuals identify themselves as members of the Church of Jesus Christ of Latter-day Saints in the 2010 census.  Church officials, however, state their membership is approximately 1.3 million.  There are large Protestant communities in the southern states of Chiapas and Tabasco.  In Chiapas, evangelical Protestant leaders state nearly half of the state’s 2.4 million inhabitants are members of evangelical groups, including Seventh-day Adventists; however, fewer than 5 percent of 2010 census respondents in Chiapas self-identify as evangelical Protestant.

According to the 2010 census, the Jewish community totals approximately 67,500 persons, of whom nearly 42,000 live in Mexico City and the state of Mexico.  Nearly half of the country’s approximately 4,000 Muslims are concentrated in Mexico City and the state of Mexico.  There is also an Ahmadi Muslim population of several hundred living in Chiapas, most of whom are converts and of ethnic Tzotzil Maya origin.  There are also small indigenous communities of Baha’i that number in the hundreds.  An estimated half of the approximately 100,000 Mennonites are concentrated in the state of Chihuahua.