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Name Lineage

    The surname Monahan

    An Irish surname, carried by 15,533 people in the United States.

    3 syllables Soundex M550

    Monahan: #2,347 of 162,253 surnames in the 2010 US Census #1Smith#160,975Doriott#10Martinez#100Jimenez#10,001Dubon Monahan #2,347, 15,533 people Monahan: #2,347 of 162,253 surnames in the 2010 US Census #1Smith#160,975Doriott#100Jimenez Monahan #2,347, 15,533 people
    Every surname held by 100 or more people in the 2010 US Census, most common on the left (162,253 in all). Monahan is more common than 98.6% of them.

    Origin

    Irish origin

    An anglicization of Irish Ó Manacháin, commonly anglicized as Monaghan.

    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 15,533 people named Monahan in the United States in 2010, about 1 in every 19,877 Americans. That is up 3.2% since 2000, when the Census counted 15,058.

    #2,347
    rank among US surnames
    15,533
    people in 2010
    5.3
    per 100,000 Americans
    +3.2%
    change since 2000 (was #2,213)
    RankSurnamePeople1 in
    #2,338Rowley15,58819,807
    #2,339Shipman15,58119,816
    #2,340Corey15,56919,831
    #2,341Craven15,56719,833
    #2,342Talbot15,56219,840
    #2,343Anders15,55419,850
    #2,344Reaves15,55019,855

    Who is named Monahan

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

    94% of people named Monahan identified as white (not Hispanic), 2.6% as Hispanic or Latino (any race) and 1.2% as two or more races.

    • White (not Hispanic) 94%
    • Hispanic or Latino (any race) 2.6%
    • Two or more races 1.2%
    • Asian and Pacific Islander 0.8%
    • Black (not Hispanic) 0.7%
    • American Indian and Alaska Native 0.3%

    Compare: most common surnames among white Americans.

    Famous Monahans

    5 notable people on Wikidata, most written-about first

    • William Monahan
      American screenwriter and novelist, born 1960
    • Patrick Monahan
      American vocalist, born 1969
    • Dan Monahan
      American actor, born 1955
    • Fintan Monahan
      Bishop of Killaloe, born 1967
    • David Monahan
      American actor, born 1971

    Spellings and sound-alikes

    Useful when a record has your ancestor under another spelling

    Surnames that sound like Monahan

    Monahan has the Soundex code M550, the code US census indexes have used since the 1930s. Every surname with code M550.

    Other Irish surnames

    All 880 Irish surnames

    Questions

    Where does the surname Monahan come from?
    An anglicization of Irish Ó Manacháin, commonly anglicized as Monaghan.
    How common is the surname Monahan?
    15,533 people in the United States had the surname Monahan in the 2010 Census, about 1 in every 19,877 Americans. It ranked 2,347th of 162,253 surnames.
    What ethnicity is the surname Monahan?
    In the 2010 Census, 94% of people named Monahan identified as white (not Hispanic), and 2.6% as Hispanic or Latino (any race).
    Who is the most famous person named Monahan?
    William Monahan, American screenwriter and novelist, followed by Patrick Monahan.
    Where is the surname Monahan most common?
    Wikidata records people named Monahan in the United States.
    Is the surname Monahan getting more or less common?
    More common. 15,058 people carried it in the 2000 Census and 15,533 in 2010, up 3.2%.