# Cahill (surname)

Source: https://namelineage.com/surname/cahill/  
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) | 20,623 |
| US rank (2010) | 1,737 of 162,253 |
| How often | about 1 in every 14,971 people |
| Change since 2000 | +2.2% (20,181 in 2000) |
| Pronunciation | /ˈkɑːhɪl/, 2 syllables |
| Variant spellings | Cohill |

## Etymology

Anglicized from Irish Ó Cathail.

## Who carries it

Share of people named Cahill 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) | 1.0% |
| Hispanic or Latino (any race) | 2.1% |
| Asian and Pacific Islander | 0.6% |
| American Indian and Alaska Native | 0.3% |
| Two or more races | 1.3% |

## Where

Wikidata records people named Cahill in the United States, Australia and Samoa.

## People named Cahill

- Tim Cahill, Australian association football player
- Eddie Cahill, American actor
- Erin Cahill, American actress
- Darren Cahill, Australian tennis player and coach
- Mike Cahill, American film director, screenwriter and producer
- Thaddeus Cahill, American inventor (1867–1934)
- Dajana Cahill, Australian actress
- Trevor Cahill, Baseball Player
- Lily Cahill, American actress
- Marie Cahill, American actress and singer (1866–1933)
- Brendan Cahill, American prelate
- Thomas Cahill, American scholar and writer

and 1 more on Wikidata.

## Similar surnames

Cahall, Call, Calle, Cali, Cail, Callow, Challa, Cal, Cole, Clay, Cooley, Coyle.

## 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.