View the most religious surnames in Ireland

Where Does The Last Name O'Rilley Come From? ^{nationality or country of origin}

O'Rilley is most common in The United States. It can be found in the variant forms:. Click here for other potential spellings of this name.

How Common Is The Last Name O'Rilley? ^{popularity and diffusion}

This surname is the 4,908,606^th most frequent surname world-wide, borne by around 1 in 455,471,620 people. The last name is primarily found in The Americas, where 75 percent of O'Rilley are found; 69 percent are found in North America and 69 percent are found in Anglo-North America.

O'Rilley is most common in The United States, where it is borne by 11 people, or 1 in 32,950,812. In The United States it is most frequent in: Arizona, where 36 percent reside, Illinois, where 18 percent reside and Michigan, where 18 percent reside. Barring The United States this surname occurs in 4 countries. It is also found in Australia, where 13 percent reside and England, where 6 percent reside.

O'Rilley Family Population Trend ^{historical fluctuation}

The incidence of O'Rilley has changed through the years. In The United States the number of people carrying the O'Rilley last name declined 42 percent between 1880 and 2014 and in England it declined 75 percent between 1881 and 2014.

O'Rilley Last Name Statistics ^demography

The religious devotion of those holding the surname is predominantly Catholic (100%) in Ireland.