View the highest/lowest earning families in The United States

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

The last name O'Callahan is carried by more people in The United States than any other country/territory. It can also occur in the variant forms:. For other potential spellings of this surname click here.

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

The last name O'Callahan is the 816,514^th most prevalent surname on a global scale It is held by approximately 1 in 21,371,102 people. The last name occurs predominantly in The Americas, where 57 percent of O'Callahan live; 57 percent live in North America and 56 percent live in Anglo-North America.

The surname O'Callahan is most numerous in The United States, where it is held by 174 people, or 1 in 2,083,097. In The United States O'Callahan is most numerous in: California, where 14 percent reside, Massachusetts, where 14 percent reside and New York, where 11 percent reside. Excluding The United States O'Callahan is found in 9 countries. It is also common in New Zealand, where 25 percent reside and Australia, where 10 percent reside.

O'Callahan Family Population Trend ^{historical fluctuation}

The incidence of O'Callahan has changed through the years. In The United States the number of people carrying the O'Callahan last name contracted 34 percent between 1880 and 2014; in Ireland it contracted 32 percent between 1901 and 2014 and in England it contracted 27 percent between 1881 and 2014.

O'Callahan Last Name Statistics ^demography

The religious devotion of those carrying the surname is predominantly Catholic (100%) in Ireland.

The amount O'Callahan earn in different countries varies greatly. In United States they earn 38.55% more than the national average, earning $59,783 USD per year and in Canada they earn 14.95% less than the national average, earning $42,255 CAD per year.