View the most religious surnames in Ireland

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

The surname O'Callaghan occurs more in Ireland more than any other country or territory. It may also occur as: Ò'callaghan. Click here for other potential spellings of this last name.

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

The surname is the 23,050^th most frequently held surname globally It is held by approximately 1 in 309,726 people. This last name occurs predominantly in Europe, where 69 percent of O'Callaghan live; 68 percent live in Northern Europe and 68 percent live in British Isles.

The surname is most frequently held in Ireland, where it is carried by 9,845 people, or 1 in 478. In Ireland O'Callaghan is most frequent in: Munster, where 57 percent reside, Leinster, where 29 percent reside and Ulster, where 8 percent reside. Aside from Ireland this last name occurs in 69 countries. It also occurs in England, where 22 percent reside and Australia, where 20 percent reside.

O'Callaghan Family Population Trend ^{historical fluctuation}

The prevalency of O'Callaghan has changed through the years. In Ireland the share of the population with the surname rose 286 percent between 1901 and 2014; in England it rose 2,484 percent between 1881 and 2014; in The United States it rose 671 percent between 1880 and 2014; in Wales it rose 3,591 percent between 1881 and 2014 and in Scotland it rose 965 percent between 1881 and 2014.

O'Callaghan Last Name Statistics ^demography

The religious devotion of those holding the O'Callaghan surname is principally Catholic (99%) in Ireland.

The amount O'Callaghan earn in different countries varies markedly. In United States they earn 59.89% more than the national average, earning $68,993 USD per year and in Canada they earn 18.55% more than the national average, earning $58,900 CAD per year.