<P> Canada, the United States and Mexico host communities of both Jews (6 million or about 1.8%), Buddhists (3.8 million or 1.1%) and Muslims (3.4 million or 1.0%). The biggest number of Jewish individuals can be found in the United States (5.4 million), Canada (375,000) and Mexico (67,476). The United States host the largest Muslim population in North America with 2.7 million or 0.9%, While Canada host about one million Muslim or 3.2% of the population . While in Mexico there were 3,700 Muslims in the country . In 2012, U-T San Diego estimated U.S. practitioners of Buddhism at 1.2 million people, of whom 40% are living in Southern California . </P> <P> The predominant religion in Central America is Christianity (96%). Beginning with the Spanish colonization of Central America in the 16th century, Roman Catholicism became the most popular religion in the region until the first half of the 20th century . Since the 1960s, there has been an increase in other Christian groups, particularly Protestantism, as well as other religious organizations, and individuals identifying themselves as having no religion . Also Christianity is the predominant religion in the Caribbean (85%). Other religious groups in the region are Hinduism, Islam, Rastafari (in Jamaica), and Afro - American religions such as Santería and Vodou . </P> <P> The most populous country in North America is the United States with 318.4 million persons . The second largest country is Mexico with a population of 112,322,757 . Canada is the third most populous country with 32,623,490 . The majority of Caribbean island - nations have national populations under a million, though Cuba, Dominican Republic, Haiti, Puerto Rico (a territory of the United States), Jamaica, and Trinidad and Tobago each have populations higher than a million . Greenland has a small population of 55,984 for its massive size (2,166,000 km2 or 836,300 mi2), and therefore, it has the world's lowest population density at 0.026 pop. / km2 (0.067 pop. / mi2). </P> <P> While the United States, Canada, and Mexico maintain the largest populations, large city populations are not restricted to those nations . There are also large cities in the Caribbean . The largest cities in North America, by far, are Mexico City and New York . These cities are the only cities on the continent to exceed eight million, and two of three in the Americas . Next in size are Los Angeles, Toronto, Chicago, Havana, Santo Domingo, and Montreal . Cities in the sunbelt regions of the United States, such as those in Southern California and Houston, Phoenix, Miami, Atlanta, and Las Vegas, are experiencing rapid growth . These causes included warm temperatures, retirement of Baby Boomers, large industry, and the influx of immigrants . Cities near the United States border, particularly in Mexico, are also experiencing large amounts of growth . Most notable is Tijuana, a city bordering San Diego that receives immigrants from all over Latin America and parts of Europe and Asia . Yet as cities grow in these warmer regions of North America, they are increasingly forced to deal with the major issue of water shortages . </P>

Is puerto rico in north or central america