View the most religious surnames in Ireland

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

O'Reily is found in Ireland more than any other country/territory. It can appear as:. For other potential spellings of this surname click here.

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

This last name is the 1,683,218^th most commonly used surname in the world, borne by approximately 1 in 62,286,717 people. The surname O'Reily occurs predominantly in Europe, where 56 percent of O'Reily reside; 56 percent reside in Northern Europe and 55 percent reside in British Isles.

It is most frequently held in Ireland, where it is borne by 30 people, or 1 in 156,965. In Ireland O'Reily is most common in: Leinster, where 73 percent reside, Ulster, where 27 percent reside and Connaught, where 7 percent reside. Aside from Ireland this surname occurs in 10 countries. It is also found in Australia, where 23 percent reside and England, where 22 percent reside.

O'Reily Family Population Trend ^{historical fluctuation}

The incidence of O'Reily has changed over time. In Ireland the number of people who held the O'Reily last name expanded 107 percent between 1901 and 2014; in England it expanded 137 percent between 1881 and 2014 and in The United States it decreased 87 percent between 1880 and 2014.

O'Reily Last Name Statistics ^demography

The religious devotion of those holding the last name is principally Catholic (86%) in Ireland.

O'Reily earn more than double the average income. In United States they earn 107.13% more than the national average, earning $89,375 USD per year.