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    The surname O'Reilly

    An Irish patronymic surname, carried by 12,074 people in the United States.

    Pronounced /əˈɹaɪli/ 3 syllables Soundex O640

    O'Reilly: #2,970 of 162,253 surnames in the 2010 US Census #1Smith#160,975Doriott#10Martinez#100Jimenez#1,000Archer#10,001Dubon O'Reilly #2,970, 12,074 people O'Reilly: #2,970 of 162,253 surnames in the 2010 US Census #1Smith#160,975Doriott#100Jimenez O'Reilly #2,970, 12,074 people
    Every surname held by 100 or more people in the 2010 US Census, most common on the left (162,253 in all). O'Reilly is more common than 98.2% of them.

    Origin

    Irish origin

    A surname from Irish [in turn originating as a patronymic] from Reilly.

    O'Reilly is a patronymic surname: formed from a father’s (or ancestor’s) given name.

    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 12,074 people named O'Reilly in the United States in 2010, about 1 in every 25,571 Americans. That is up 7.6% since 2000, when the Census counted 11,224.

    #2,970
    rank among US surnames
    12,074
    people in 2010
    4.1
    per 100,000 Americans
    +7.6%
    change since 2000 (was #2,946)
    RankSurnamePeople1 in
    #2,961Masterson12,11725,480
    #2,962Porras12,10625,504
    #2,963Moulton12,10425,508
    #2,964Monk12,10325,510
    #2,965Pence12,10125,514
    #2,966Hatton12,09025,537
    #2,967Rust12,08625,546

    Who is named O'Reilly

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

    92% of people named O'Reilly identified as white (not Hispanic), 3.5% as Hispanic or Latino (any race) and 2.0% as Black (not Hispanic).

    • White (not Hispanic) 92%
    • Hispanic or Latino (any race) 3.5%
    • Black (not Hispanic) 2.0%
    • Two or more races 1.5%
    • Asian and Pacific Islander 0.7%
    • American Indian and Alaska Native 0.3%

    Compare: most common surnames among white Americans.

    Famous O'Reillys

    8 notable people on Wikidata, most written-about first

    • Bill O'Reilly
      American political commentator, television host and writer, born 1949
    • Heather O'Reilly
      American soccer player, born 1985
    • Ahna O'Reilly
      Actress, born 1984
    • Mary Margaret O'Reilly
      Assistant treasurer of the United States Bureau of the Mint, 1865–1949
    • Bill O'Reilly
      Australian cricketer (1905-1992)
    • Leonora O'Reilly
      American activist, 1870–1927
    • Robert O'Reilly
      American actor, born 1950
    • Cyril O'Reilly
      American actor, born 1958

    Notable O'Reillys come mostly from the United States (7) and Australia (1).

    Spellings and sound-alikes

    Useful when a record has your ancestor under another spelling

    Surnames that sound like O'Reilly

    O'Reilly has the Soundex code O640, the code US census indexes have used since the 1930s. Every surname with code O640.

    Other Irish surnames

    All 880 Irish surnames

    Questions

    Where does the surname O'Reilly come from?
    O'Reilly is Irish in origin.
    How common is the surname O'Reilly?
    12,074 people in the United States had the surname O'Reilly in the 2010 Census, about 1 in every 25,571 Americans. It ranked 2,970th of 162,253 surnames.
    What ethnicity is the surname O'Reilly?
    In the 2010 Census, 92% of people named O'Reilly identified as white (not Hispanic), and 3.5% as Hispanic or Latino (any race).
    Who is the most famous person named O'Reilly?
    Bill O'Reilly, American political commentator, television host and writer, followed by Heather O'Reilly.
    Where is the surname O'Reilly most common?
    Wikidata records people named O'Reilly in the United States and Australia.
    How do you pronounce O'Reilly?
    O'Reilly is /əˈɹaɪli/, 3 syllables.
    What type of surname is O'Reilly?
    O'Reilly is a patronymic surname, formed from a father’s (or ancestor’s) given name.
    Is the surname O'Reilly getting more or less common?
    More common. 11,224 people carried it in the 2000 Census and 12,074 in 2010, up 7.6%.