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

The surname O'Leary has its highest incidence in Ireland. It may also be found as a variant:. For other potential spellings of this last name click here.

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

It is the 13,816^th most common family name on earth, held by around 1 in 180,559 people. O'Leary is primarily found 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 frequently occurring first name on earth, held by 57 people.

The surname O'Leary is most commonly occurring in Ireland, where it is borne by 13,589 people, or 1 in 347. In Ireland it 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 it is found in 81 countries. It is also common in The United States, where 21 percent are found and England, where 18 percent are found.

O'Leary Family Population Trend ^{historical fluctuation}

The occurrence of O'Leary has changed through the years. In Ireland the number of people bearing the O'Leary surname 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 adherence of those bearing the O'Leary surname is principally 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 US average, with 100% registered to vote for 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.