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O'callahan Family History

O'callahan Surname Meaning

Irish: Anglicized form of Gaelic Ó Ceallacháin (see Callahan).

Source: Dictionary of American Family Names ©2013, Oxford University Press


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Where is the O'callahan family from?

You can see how O'callahan families moved over time by selecting different census years. The O'callahan family name was found in the USA between 1880 and 1920. The most O'callahan families were found in USA in 1880. In 1880 there were 49 O'callahan families living in New York. This was about 24% of all the recorded O'callahan's in USA. New York had the highest population of O'callahan families in 1880.
Use census records and voter lists to see where families with the O'callahan surname lived. Within census records, you can often find information like name of household members, ages, birthplaces, residences, and occupations.
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What O'callahan family records will you find?

Census Records

There are 4,000 census records available for the last name O'callahan. Like a window into their day-to-day life, O'callahan census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

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Passenger Lists

There are 900 immigration records available for the last name O'callahan. Passenger lists are your ticket to knowing when your ancestors arrived in the UK, and how they made the journey - from the ship name to ports of arrival and departure.

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Draft Cards

There are 744 military records available for the last name O'callahan. For the veterans among your O'callahan ancestors, military collections provide insights into where and when they served, and even physical descriptions.

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What is the average O'callahan lifespan?

Average O'callahan life expectancy in 2003 was 85 years. This was higher than the general public life expectancy which was 74.

View Social Security Death Index (SSDI) for O'callahan

An unusually short lifespan might indicate that your O'callahan ancestors lived in harsh conditions. A short lifespan might also indicate health problems that were once prevalent in your family. The SSDI is a searchable database of more than 70 million names. You can find birthdates, death dates, addresses and more.

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