4. Spain
Increase: 302%
Among listed European countries, Spain, the number 4 in our list of countries where Muslim population will increase the most by 2050, has the greatest Muslim population. In 2010, there were 980,000 Islam followers, while in the next 40 years the number will rise by 302% reaching 3.94 million. Christian population will decline from 36.24 million to 34.1 million or, in percentage terms, it will go down from 78.6% to 65.2% of the total population. The number of people without religion, who, currently, constitute the second-largest religious group with 8.7 million members, will go up reaching 13.85 million.
lidian Neeleman/Shutterstock.com
