Table: % of Population who were Catholic in 9 Counties of Ulster 1861-1961
1961 1926 1911 1861 Change 1861-1911 Change 1911-1961 Change 1861-1961
Belfast City 28% 23% 24% 31% -7.3% 3.9% -3.4%
Co. Antrim 24% 20% 21% 25% -4.3% 3.5% -0.8%
Co. Armagh 47% 45% 45% 49% -3.5% 1.7% -1.8%
Co. Cavan 88% 84% 82% 81% 1.0% 6.5% 7.5%
Co. Donegal 86% 82% 79% 75% 3.9% 7.1% 11.0%
Co. Fermanagh 53% 56% 56% 57% -0.3% -3.2% -3.5%
Co. Londonderry 42% 42% 42% 45% -3.8% 0.5% -3.3%
Co. Monaghan 86% 79% 75% 73% 1.3% 11.3% 12.6%
Co. Tyrone 55% 55% 55% 57% -1.1% -0.4% -1.5%
Co.Down 29% 30% 32% 33% -0.9% -2.6% -3.5%
Derry City 62% 60% 56% * * 5.8% *