Scotland a territorial parish structure, with every community in Scotland having a local congregation. Scotland also has a significant Roman Catholic population, 19% professing that faith, particularly in Greater Glasgow and the north-west. After the Reformation, Roman Catholicism in Scotland continued in the Highlands and some western islands like Uist and Barra, and it was strengthened during the 19th century by immigration from Ireland. Other Christian denominations in Scotland include the Free Church of Scotland, and various other Presbyterian offshoots. Scotland's third largest church is the Scottish Episcopal Church. Islam is the largest non-Christian religion (estimated at around 75,000, which is
Religion in Scotland other than the Church of Scotland were: The second largest Presbyterian denomination in Scotland is the Free Church of Scotland with 10,896 people identifying as being of that church at the 2011 census. According to the Free Church, its average weekly attendance at a worship service is around 13,000. According to the 2016 Church Census, Free Church attendance was around 10,000 per week and amounted to 7% of all Presbyterian church attendance in Scotland. As of 2016 there were 102 Free Church congregations, organized into six presbyteries. A significant proportion of Free Church activity is to be found in the