Find out how popular the last name O'Halloran is in the United States and learn more about the meaning, history, and race and ethnic origin of people in America who are named O'Halloran.

O'Halloran, like all of the last names we have data for, is identified by the U.S. Census Bureau as a surname which has more than 100 occurrences in the United States in the Decennial Census survey. The most recent statistics we have for the O'Halloran surname is from the 2010 census data.

Popularity of O'Halloran in America

O'Halloran is the 9839th most popular name in America based on the data we have collected from the U.S. Census Bureau.

The O'Halloran surname appeared 3,289 times in the 2010 census and if you were to sample 100,000 people in the United States, approximately 1 people would have the surname O'Halloran.

We can also compare 2010 data for O'Halloran to data from the previous census in 2000. The table below contains all of the statistics for both years in a side-by-side comparison.

The history of the last name O'Halloran

The surname OHALLORAN is of Irish origin, tracing its roots back to the 16th century in the province of Munster. It is derived from the Gaelic Ó hAllmhuráin, which means "descendant of Allmhurán". Allmhurán was a personal name that likely originated from a combination of the Irish words "all" meaning "foreigner" and "muirn" meaning "affection" or "love".

One of the earliest recorded mentions of the name can be found in the Fiants of the Reign of Queen Elizabeth, where a James O'Halloran was listed as a landholder in County Cork in 1586. The name was also found in various Gaelic annals and chronicles from the same period, indicating its prevalence among the Gaelic Irish population.

During the 17th and 18th centuries, the OHALLORAN name was concentrated in counties Cork and Kerry, particularly in the baronies of Duhallow and Magunihy. Notable figures from this era include Reverend Donough O'Halloran (1615-1684), a Catholic priest and poet, and Sylvester O'Halloran (1728-1807), a prominent historian and author best known for his work "An Introduction to the Study of the Ancient History of Ireland".

In the 19th century, the name spread more widely across Ireland and beyond due to emigration. One notable bearer was Sir Joseph O'Halloran (1824-1899), an Irish lawyer and politician who served as Solicitor General for Ireland and a Member of Parliament for Cavan.

As the 20th century dawned, the name continued to be found throughout Ireland and in Irish communities abroad. Notable individuals include Michael O'Halloran (1888-1966), an Irish writer and politician, and Monsignor Patrick O'Halloran (1897-1978), a prominent Catholic clergyman who served as the President of St. Patrick's College in Thurles, County Tipperary.

While the OHALLORAN surname has its origins in a specific region of Ireland, it has since become widespread and can be found among Irish diaspora communities around the world, carrying with it the rich cultural heritage and history of the Gaelic Irish people.

Race and ethnic origin of people with the last name O'Halloran

We also have some data on the ancestry of people with the surname O'Halloran.

The below race categories are the modified race categories used in the Census Bureau's population estimates program. All people were categorized into six mutually exclusive racial and Hispanic origin groups:

1. White only
2. Black only
3. American Indian and Alaskan Native only
4. Asian and Pacific Islander only
5. Hispanic
6. Two or More Races

For the most recent 2010 census data, the race/ethnic origin breakdown for O'Halloran was:

Note: Any fields showing (S) means the data was suppressed for privacy so that the data does not in any way identify any specific individuals.

Since we have data from the previous census in 2000, we can also compare the values to see how the popularity of O'Halloran has changed in the 10 years between the two census surveys.

Data source

The last name data and ethnic breakdown of last names is sourced directly from the Decennial Census survey, conducted every 10 years by the United States Census Bureau.

The history and meaning of the name O'Halloran was researched and written by our team of onomatology and genealogy experts.

If you have a correction or suggestion to improve the history of O'Halloran, please contact us.

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