Demographics
No clear statistics of any Turkish empire province has been assimilated. What is known though is that before the independence of Albania from Turkey, when the country had 1,500,000 inhabitants, the population's religious percentages were as these: 65% Muslim, 25% Albanian Orthodox Christian and 10% Roman Catholic. Nonetheless, the statistics have changed significantly to this: 38.8% Muslim, 35.4% Christian (16.8% Roman Catholic, 16.1% Orthodox Christian, 0.6% Protestant, 0.6% Independent), 16.6% Non-religious (9.0% Atheist), 0.2% Baha'i.
A Pew Research Center demographic study from 2009 put the percentage of Muslims in Albania at 79.9%. The CIA World Factbook uses the figures from the 1939 Census of 70% Muslim, 20% Eastern Orthodox Christian, and 10% Roman Catholic. In the 2011 census the declared religious affiliation of the population was: 56.7% Muslims, 13.79% undeclared, 10.03% Catholics, 6.75% Orthodox believers, 5.49% other, 2.5% Atheists, 2.09% Bektashis and 0.14% other Christians.
Read more about this topic: Roman Catholicism In Albania