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
Geography of Scotland in the early modern era after the famine of 1595, as prices were relatively stable in the early seventeenth century. Calculations based on Hearth Tax returns for 1691 indicate a population of 1,234,575. This level may have been seriously effected by the famines of the 1690s. The first reliable information available on national population is from the census conducted by the Reverend Alexander Webster in 1755, which showed the inhabitants of Scotland as 1,265,380 persons. Compared with the situation after the redistribution of population as a result of the clearances and the industrial revolution that began in the eighteenth century, the population was evenly spread