# Reilly (surname)

Source: https://namelineage.com/surname/reilly/  
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) | 40,884 |
| US rank (2010) | 845 of 162,253 |
| How often | about 1 in every 7,552 people |
| Change since 2000 | +1.4% (40,310 in 2000) |
| Pronunciation | /ˈɹaɪli/, 2 syllables |
| Variant spellings | none recorded |

## Etymology

From Irish Ó Raghallaigh, a surname meaning "descendants of Raghallach".

## Who carries it

Share of people named Reilly 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) | 95% |
| Black (not Hispanic) | 0.4% |
| Hispanic or Latino (any race) | 2.3% |
| Asian and Pacific Islander | 0.7% |
| American Indian and Alaska Native | 0.1% |
| Two or more races | 1.2% |

## Where

Wikidata records people named Reilly in the United States, the United Kingdom and Australia.

## People named Reilly

- John C. Reilly, American actor (born 1965)
- Kelly Reilly, British actress
- Charles Nelson Reilly, American comedian and actor (1931–2007)
- James F. Reilly, American astronaut
- Matthew Reilly, Australian author
- Kieran Reilly, British bicycle motocross rider
- John Reilly, American actor (1934-2021)
- Mike Reilly, American ice hockey defenceman
- Terry Reilly, Australian archer (1947–2025)
- Hugh Reilly, American actor (1915-1998)
- Ariana, American pornographic actress
- Ursula Curtiss, American author (1923–1984)

## Similar surnames

Riley, Riel, Reiley, Reilley, Reily, Reil, Roell, Relyea, Rowell, Rowley, Royal, Real.

## 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.