View the most religious surnames in Ireland

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

O'Leary occurs more in Ireland more than any other country/territory. It can also be found in the variant forms:. For other possible spellings of O'Leary click here.

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

This surname is the 13,816^th most numerous last name on earth, borne by around 1 in 180,559 people. It 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 used given name in the world, borne by 57 people.

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

O'Leary Family Population Trend ^{historical fluctuation}

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

O'Leary Last Name Statistics ^demography

The religious adherence of those bearing the O'Leary last name is primarily Catholic (99%) in Ireland.

In The United States those holding 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.