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

O'Leary is more commonly found in Ireland than any other country or territory. It can be rendered in the variant forms:. Click here for other potential spellings of this surname.

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

This surname is the 13,816^th most commonly used last name worldwide. It is borne by around 1 in 180,559 people. The surname O'Leary occurs mostly in Europe, where 55 percent of O'Leary are found; 55 percent are found in Northern Europe and 55 percent are found in British Isles. It is also the 1,308,380^th most numerous first name in the world It is held by 57 people.

It is most frequently occurring in Ireland, where it is held by 13,589 people, or 1 in 347. In Ireland it is mostly concentrated in: Munster, where 54 percent live, Leinster, where 32 percent live and Connaught, where 3 percent live. Other than Ireland O'Leary occurs in 81 countries. It is also common in The United States, where 21 percent live and England, where 18 percent live.

O'Leary Family Population Trend ^{historical fluctuation}

The incidence of O'Leary has changed over time. In Ireland the number of people carrying the O'Leary surname increased 304 percent between 1901 and 2014; in The United States it increased 148 percent between 1880 and 2014; in England it increased 750 percent between 1881 and 2014; in Wales it increased 481 percent between 1881 and 2014 and in Scotland it increased 781 percent between 1881 and 2014.

O'Leary Last Name Statistics ^demography

The religious adherence of those holding the O'Leary surname is chiefly Catholic (99%) in Ireland.

In The United States those bearing the O'Leary surname are 53.23% more likely to be registered with the Republican Party than the national average, with 100% registered with the party.

The amount O'Leary earn in different countries varies greatly. In United States they earn 72.17% more than the national average, earning $74,290 USD per year and in Canada they earn 2.66% more than the national average, earning $51,006 CAD per year.