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

The surname O'Leary is found most in Ireland. It can also occur as:. For other potential spellings of O'Leary click here.

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

This last name is the 13,816^th most commonly held surname worldwide, held by approximately 1 in 180,559 people. The last name 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. O'Leary is also the 1,308,380^th most prevalent first name at a global level, borne by 57 people.

The surname O'Leary is most frequently held in Ireland, where it is carried by 13,589 people, or 1 in 347. In Ireland O'Leary is most frequent in: Munster, where 54 percent are found, Leinster, where 32 percent are found and Connaught, where 3 percent are found. Other than Ireland this last name occurs in 81 countries. It is also found in The United States, where 21 percent are found and England, where 18 percent are found.

O'Leary Family Population Trend ^{historical fluctuation}

The incidence of O'Leary has changed through the years. In Ireland the number of people bearing the O'Leary last name rose 304 percent between 1901 and 2014; in The United States it rose 148 percent between 1880 and 2014; in England it rose 750 percent between 1881 and 2014; in Wales it rose 481 percent between 1881 and 2014 and in Scotland it rose 781 percent between 1881 and 2014.

O'Leary Last Name Statistics ^demography

The religious devotion 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% being registered with the political 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.