# O'Halloran (surname)

Source: https://namelineage.com/surname/ohalloran/  
Publisher: Name Lineage. Counts from the US Census Bureau; origin and etymology from Wiktionary; bearers from Wikidata. Data updated 2026-11-11.

A surname from Irish.

| Field | Value |
|---|---|
| Origin | Irish |
| Type | not recorded |
| People in the US (2010 Census) | 3,289 |
| US rank (2010) | 9,839 of 162,253 |
| How often | about 1 in every 93,872 people |
| Change since 2000 | +5.1% (3,128 in 2000) |
| Pronunciation | not recorded |
| Variant spellings | none recorded |

## Etymology

Variant of Halloran.

## Who carries it

Share of people named O'Halloran in the 2010 US Census by the Census's own race and ethnicity groups. The Census suppresses a share when the count behind it is small.

| Group | Share |
|---|---|
| White (not Hispanic) | 93% |
| Hispanic or Latino (any race) | 3.7% |
| Asian and Pacific Islander | 1.0% |
| Two or more races | 1.3% |

## Where

Wikidata records people named O'Halloran in the United States and Australia.

## People named O'Halloran

- Brian O'Halloran, American actor and producer
- Jack O'Halloran, American boxer, actor
- Dustin O'Halloran, American musician
- Kevin O'Halloran, Australian swimmer, Olympic gold medallist (1937–1976)

## How to read these numbers

A Census count is people alive and counted in 2010, not births, and names occurring fewer than 100 times are not published at all. Ethnicity shares are the Census's own categories.