A map of districts in Northern Ireland showing the percentage difference of people who identified themselves as "Roman Catholic" and "Protestant". "Legend:" Over 50% more Protestant 45-50% more Protestant 40-45% more Protestant 35-40% more Protestant 25-30% more Protestant 20-25% more Protestant 15-20% more Protestant 10-15% more Protestant 5-10% more Protestant 0-5% more Protestant 0-5% more Roman Catholic 5-10% more Roman Catholic 10-15% more Roman Catholic 15-20% more Roman Catholic 20-25% more Roman Catholic 25-30% more Roman Catholic 30-35% more Roman Catholic 35-40% more Roman Catholic 40-45% more Roman Catholic 45-50% more Roman Catholic Over 50% more Roman Catholic NUTS 3 regions of Northern Ireland map.svg