How common is the surname Cahill?

20,623 people in the United States had the surname Cahill in the 2010 Census, about 1 in every 14,971 Americans. It ranked 1,737th of 162,253 surnames.

What ethnicity is the surname Cahill?

In the 2010 Census, 95% of people named Cahill identified as white (not Hispanic), and 2.1% as Hispanic or Latino (any race).

Who is the most famous person named Cahill?

Tim Cahill, Australian association football player, followed by Eddie Cahill.

Where is the surname Cahill most common?

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

How do you pronounce Cahill?

Cahill is /ˈkɑːhɪl/, 2 syllables.

Is the surname Cahill getting more or less common?

More common. 20,181 people carried it in the 2000 Census and 20,623 in 2010, up 2.2%.

The surname Cahill

An Irish surname, carried by 20,623 people in the United States.

Pronounced /ˈkɑːhɪl/ 2 syllables Soundex C400

Every surname held by 100 or more people in the 2010 US Census, most common on the left (162,253 in all). Cahill is more common than 98.9% of them.

Origin

Irish origin

Anglicized from Irish Ó Cathail.

One of 880 Irish surnames on this site.

Origin from Wiktionary (CC BY-SA 4.0).

How common it is

2010 US Census

There were 20,623 people named Cahill in the United States in 2010, about 1 in every 14,971 Americans. That is up 2.2% since 2000, when the Census counted 20,181.

#1,737

rank among US surnames

20,623

people in 2010

7.0

per 100,000 Americans

+2.2%

change since 2000 (was #1,625)

Rank	Surname	People	1 in
#1,728	Jorgensen	20,731	14,893
#1,729	Maurer	20,707	14,910
#1,730	Kearney	20,706	14,911
#1,731	Cummins	20,705	14,912
#1,732	Milton	20,703	14,913
#1,734	Timmons	20,671	14,936
#1,735	Palma	20,636	14,962

Who is named Cahill

Race and Hispanic origin as people reported it in the 2010 Census

95% of people named Cahill identified as white (not Hispanic), 2.1% as Hispanic or Latino (any race) and 1.3% as two or more races.

White (not Hispanic) 95%
Hispanic or Latino (any race) 2.1%
Two or more races 1.3%
Black (not Hispanic) 1.0%
Asian and Pacific Islander 0.6%
American Indian and Alaska Native 0.3%

Compare: most common surnames among white Americans.

Famous Cahills

13 notable people on Wikidata, most written-about first

Tim Cahill
Australian association football player, born 1979
Eddie Cahill
American actor, born 1978
Erin Cahill
American actress, born 1980
Darren Cahill
Australian tennis player and coach, born 1965
Mike Cahill
American film director, screenwriter and producer, born 1979
Thaddeus Cahill
American inventor (1867–1934)
Dajana Cahill
Australian actress, born 1989
Trevor Cahill
Baseball Player, born 1988
Lily Cahill
American actress, 1885–1955
Marie Cahill
American actress and singer (1866–1933)
Brendan Cahill
American prelate, born 1963
Thomas Cahill
American scholar and writer, 1940–2022

Notable Cahills come mostly from the United States (9), Australia (3) and Samoa (1).

Spellings and sound-alikes

Useful when a record has your ancestor under another spelling

Variant spellings

Cohill

Surnames that sound like Cahill

Cahill has the Soundex code C400, the code US census indexes have used since the 1930s. Every surname with code C400.

Other Irish surnames

All 880 Irish surnames

Questions

Where does the surname Cahill come from?: Anglicized from Irish Ó Cathail.
How common is the surname Cahill?: 20,623 people in the United States had the surname Cahill in the 2010 Census, about 1 in every 14,971 Americans. It ranked 1,737th of 162,253 surnames.
What ethnicity is the surname Cahill?: In the 2010 Census, 95% of people named Cahill identified as white (not Hispanic), and 2.1% as Hispanic or Latino (any race).
Who is the most famous person named Cahill?: Tim Cahill, Australian association football player, followed by Eddie Cahill.
Where is the surname Cahill most common?: Wikidata records people named Cahill in the United States, Australia and Samoa.
How do you pronounce Cahill?: Cahill is /ˈkɑːhɪl/, 2 syllables.
Is the surname Cahill getting more or less common?: More common. 20,181 people carried it in the 2000 Census and 20,623 in 2010, up 2.2%.
What are other spellings of Cahill?: Cohill.