5. Ireland
Increase: 300%
In Ireland, ranked as fifth on our list of 10 countries where Muslim population will increase the most by 2050, Islam adherents represent the largest religious majority. Currently, around 50,000 Muslims account for 1.1% of the total population. By 2050 the number of Muslims will reach the number of 200,000, or in other words, they will constitute 3% of all residents. At the same time, the number of Christians will also increase, but their share in the total population will fall to 83.5% from 92%.