The Cassidy surname

In the 2010 U.S. Census, 26,590 people carried this name — #1,325 among all U.S. surnames, about 1 in every 11,100 people counted. That is up 2% from 26,011 in 2000.

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What the name means

The meaning of the Cassidy surname

A surname from Irish anglicized from Ó Casaide (“descendant of Caiside”). Caiside is a byname from Irish cas (“curly”) meaning “curly-haired”.

From the Irish surname, Anglicized from Ó Caiside (“descendant of Caiside”), from cas (“curly-haired”).

From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Cassidy» (English), by Wiktionary contributors · licensed CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0) · excerpt, lightly adapted.

In Ireland’s birth registers, 1890

Ireland registered 141 births for the Cassidy name in 1890.

They were registered in all four provinces, most of all in Ulster. By the Registrar-General’s own method — births multiplied by 44.38 — that is about 6,300 people bearing the name in Ireland at the time. One of them was indexed under another spelling of the name. The Registrar-General’s note on the name: “Donegal, Dublin, Antrim, and Fermanagh.”

Where it concentrates, on the map

Where they were born, 1890

Ulster 96
Leinster 26
Connacht 16
Munster 3

Registrar-General for Ireland, «Special Report on Surnames in Ireland» (R. E. Matheson, 1894), births index of 1890 — public domain.

In Argentina’s national register

At least 92 people named Cassidy live in Argentina.

RENAPER only publishes a name in a province when more than ten people there share it, so the real number is higher. Most of them live in Buenos Aires Province.

Too few records to say where it concentrates region by region — these are plain counts, not shares.

Where they live today

Buenos Aires Province 54
La Pampa 25
Córdoba 13

RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.

In Switzerland’s population statistics

68 people named Cassidy live in Switzerland.

They live in 9 of Switzerland’s 26 cantons, most of all in Zurich.

Too few records to say where it concentrates region by region — these are plain counts, not shares.

Where they live today

Zurich 23
Basel-Landschaft 8
Basel-Stadt 8
Vaud 7
St. Gallen 6
Solothurn 5
Schwyz 5
Aargau 3

Swiss Federal Statistical Office (FSO), «Surnames of the permanent resident population by canton», 2025, opendata.swiss/en/dataset/nachnamen-der-standigen-wohnbevolkerung-nach-kanton3 · names with fewer than 3 bearers in a canton are not published.

In the Nordic population registers

31 people named Cassidy is counted in Sweden.

Sweden’s figure is from 31 December 2022, the last count Statistics Sweden published.

Counted, by country

Sweden (2022) 31

Own calculations based on data from Statistics Sweden (SCB), surnames with at least two bearers, 31 December 2022 — CC BY 4.0 (names with 20 or more bearers shown).

In Scotland’s registers today

Cassidy was recorded 112 times in Scotland’s registers of births, marriages and deaths in 2025.

That made it the 220th most common name in those registers, shared with others on the same count. In 1975, the first year of the series, the count was 186. Each birth counts the child’s surname, each marriage both partners’ and each death the surname of the person who died — a yearly count of registrations, not of the people who live in Scotland.

National Records of Scotland, «Most Common Surnames, 2025» (published 26 May 2026): every surname recorded 10 or more times in the 2025 registers, and the series from 1975 · different spellings are counted separately — © Crown copyright 2026. Contains public sector information licensed under the Open Government Licence v3.0.

In print

Cassidy in American newspapers,
1914.

Newspaper page from Northern Wisconsin Advertiser carrying the name Cassidy
Northern Wisconsin Advertiser 1914-11-20
Newspaper page from Ladysmith News-budget carrying the name Cassidy
Ladysmith News-budget 1914-11-20
Newspaper page from The Manitowoc Pilot carrying the name Cassidy
The Manitowoc Pilot 1914-11-19

Chronicling America, Library of Congress — digitised newspapers in the public domain · 6,032 pages in all carry the name.

In print

Cassidy in Australian newspapers,
1820s–2010s.

41,585 articles name a Mr, Mrs or Miss Cassidy. The most, 8,553, date from the 1930s. New South Wales has the most articles, but weighed against how much of each state’s press from the same decades has been digitised, the name stands out most in the Australian Capital Territory, at 1.6 times its expected share.

Articles, by state

New South Wales 21,549
Queensland 6,439
Victoria 5,460
Western Australia 2,901
Tasmania 2,740
South Australia 1,530
ACT (Canberra) 848
Northern Territory 20

Trove, National Library of Australia (trove.nla.gov.au) · articles in its digitised newspapers that name a Mr, Mrs or Miss Cassidy.

Who carried it

People named Cassidy,
with a public archive behind them.

  • Andrew Cassidy
    Andrew Cassidy 1817–1907
  • Francis Cassidy
    Francis Cassidy 1827–1873 · lawyer
  • Michael Cassidy
    Michael Cassidy 1837–1908 · military officer
  • John Cassidy
    John Cassidy 1860–1939 · painter
  • Butch Cassidy
    Butch Cassidy 1866–1908 · criminal

Wikidata (CC0) · portraits via Wikimedia Commons, shown cropped, in the public domain or CC0 · 235 lives in all are documented under this name.

In the public record

People named Cassidy,
in the records of 8 countries.

Soldiers, farmers, migrants and neighbours who carried the name and left a trace in public archives. Everyone shown here died long ago or was born more than a century ago.

United States9,173 records

9,173 records of the Cassidy name in the United States
  • New York City birth, marriage and death certificates 3,437
  • Passenger arrivals in the United States, 1820–1912 2,537
  • Other U.S. records 3,199
  1. Names engraved on the Vietnam Veterans Memorial, Washington, D.C.
    Example: U.S. war memorial
    War record Raymond Senter Cassidy

    Born 1947; from Patchogue, New York. U.S. Army, infantryman; killed in action 1967 in Bien Hoa, South Vietnam. Buried at Long Island National Cemetery, New York.

    U.S. National Archives, Defense Casualty Analysis System (public domain); U.S. Department of Veterans Affairs, Gravesite Locator (CC0)
  2. A United States Selective Service registration card, 1942
    Example: U.S. registration card, 1942
    Military record Francis J. Cassidy

    Born 1908 in New York. Enlisted 1941 at Jamaica; driver from Queens County. U.S. Army veteran of World War II; died 1985, buried at Long Island National Cemetery, New York.

    U.S. National Archives, WWII Army Enlistment Records (public domain); U.S. Department of Veterans Affairs, Gravesite Locator (CC0)
  3. A passenger manifest of the S.S. St. Paul, arriving at New York in 1903
    Example: passenger manifest, 1903
    Passenger record Mary Cassidy

    Arrived at New York in 1892 aboard the City of Rome from Glasgow and Moville, aged 25; servant. From Fermanagh, Ireland; bound for New York.

    U.S. National Archives, Castle Garden Immigration Center Collection, Ship Passenger Records (unrestricted)

Showing 3 of 9,173 records for Cassidy in the United States.

Counts: NYC Department of Records & Information Services, Historical Vital Records (NYC Open Data) · U.S. National Archives, Castle Garden Immigration Center Collection, Ship Passenger Records (unrestricted) · U.S. National Archives, WWII Army Enlistment Records (public domain) · U.S. National Archives, Famine Irish Passenger Records (public domain) · U.S. Department of Veterans Affairs, Gravesite Locator (CC0) · U.S. National Archives, Flexoline Index Data File (public domain) · New York State Department of Health, Genealogical Research Death Index · U.S. National Archives, Defense Casualty Analysis System (public domain) · Sacramento County, Historic Burials (CC BY 4.0) · New York State, Open NY (police and firefighter memorial rolls). Example pages, not the records of the people shown: Vietnam Veterans Memorial, photo by U.S. Army Sgt. 1st Class Michael J. Carden, 2009 (public domain); U.S. Selective Service registration card, 1942 (public domain); Passenger manifest of the S.S. St. Paul, New York, 1903 (public domain).

Australia1,641 records

1,641 records of the Cassidy name in Australia
  • Victoria passenger lists, 1839–1923 568
  • Tasmanian Names Index 392
  • Other Australian records 681
  1. An 1829 etching of convicts being rowed out to the prison ship York in Portsmouth Harbour
    Pictured: convicts going on board a prison ship, 1829
    Transportation record Bridget Cassidy

    Transported to Van Diemen's Land aboard the St Vincent, sailing from London in 1849. Native of Kildare. Applied for permission to marry in Van Diemen's Land in 1854. Married 1854 in Launceston, Tasmania.

    Libraries Tasmania, Tasmanian Names Index (CC BY 4.0)
  2. An 1829 etching of convicts being rowed out to the prison ship York in Portsmouth Harbour
    Pictured: convicts going on board a prison ship, 1829
    Transportation record Mary Ann Cassidy

    Transported to Van Diemen's Land aboard the Blackfriar, sailing from Kingston in 1851. Native of Derry. Applied for permission to marry in Van Diemen's Land in 1856. Married 1856 in Hobart, Tasmania, aged 21.

    Libraries Tasmania, Tasmanian Names Index (CC BY 4.0)
  3. An 1829 etching of convicts being rowed out to the prison ship York in Portsmouth Harbour
    Pictured: convicts going on board a prison ship, 1829
    Transportation record Esther Cassidy

    Transported to Van Diemen's Land aboard the Hope, sailing from Dublin in 1842. Native of Ballymoney, Antrim. Applied for permission to marry in Van Diemen's Land in 1845.

    Libraries Tasmania, Tasmanian Names Index (CC BY 4.0)

Showing 3 of 1,641 records for Cassidy in Australia.

Counts: Public Record Office Victoria (CC BY 4.0) · Libraries Tasmania, Tasmanian Names Index (CC BY 4.0) · Queensland State Archives (CC BY 4.0) · Museums of History NSW – State Archives Collection (CC BY) · ACT Government, Transport Canberra and City Services (CC BY 4.0) · State Library of Western Australia (CC BY 4.0) · National Library of Scotland, War Office Weekly Casualty Lists (public domain). Example pages, not the records of the people shown: Prison-ship in Portsmouth Harbour, with the convicts going on board, etching by Edward William Cooke, 1829, Royal Museums Greenwich (public domain).

Canada338 records

338 records of the Cassidy name in Canada
  • Nova Scotia Archives name indexes 199
  • Mountain View Cemetery, Vancouver 47
  • Other Canadian records 92
  1. A page of the Berlin civil register, 1880
    Example: civil register, 1880
    Civil record Charles Cassidy

    Killed in 1941 at the Acadia Coal Co. mine, Nova Scotia.

    Nova Scotia Archives. Contains information licensed under the Open Government Licence - Nova Scotia.
  2. A passenger manifest of the S.S. St. Paul, arriving at New York in 1903
    Example: passenger manifest, 1903
    Passenger record James Cassidy

    Came to Ontario in 1879 aboard the Moravian, landing at Quebec, bound for Brampton, Ontario; Irish.

    Archives of Ontario. Contains information licensed under the Open Government Licence – Ontario.
  3. Fairview Lawn Cemetery in Halifax, Nova Scotia
    Example: Canadian cemetery
    Burial record William James Cassidy

    Buried in 1971 at Queen's Park Cemetery, Calgary, Alberta, aged 60.

    City of Calgary. Contains information licensed under the Open Government Licence – City of Calgary.

Showing 3 of 338 records for Cassidy in Canada.

Counts: Nova Scotia Archives. Contains information licensed under the Open Government Licence - Nova Scotia. · City of Vancouver. Contains information licensed under the Open Government Licence – Vancouver. · City of Calgary. Contains information licensed under the Open Government Licence – City of Calgary. · Veterans Affairs Canada. Contains information licensed under the Open Government Licence - Canada. · City of Winnipeg. Contains information licensed under the Open Government Licence – Winnipeg. · Archives of Ontario. Contains information licensed under the Open Government Licence – Ontario. · Halifax Regional Municipality. Contains information licenced under the Open Government Licence—Halifax. · National Library of Scotland, War Office Weekly Casualty Lists (public domain) · Contains information provided by the City of Waterloo under licence. Example pages, not the records of the people shown: Civil register, Berlin, 1880, Landesarchiv Berlin (CC0); Passenger manifest of the S.S. St. Paul, New York, 1903 (public domain); Fairview Lawn Cemetery, Halifax, photo by Edgar El (CC BY 3.0).

United Kingdom87 records

87 records of the Cassidy name in the United Kingdom
  • Stirling Council burial records 46
  • War Office casualty lists, 1917–1919, among the dead 36
  • St James's burial ground, Euston (London), 1789–1853 5
  1. A page of the burial register of Newtown, Wales, 1858
    Example: burial register, 1858
    Burial record Hugh Cassidy

    Died 1959, aged 51; buried at Bannockburn Cemetery, Stirling, Scotland.

    Stirling Council. Contains public sector information licensed under the Open Government Licence v3.0.
  2. A page of the burial register of Newtown, Wales, 1858
    Example: burial register, 1858
    Burial record Lawrance Cassidy

    Buried in 1827 at St James's burial ground, Euston, London, aged 55.

    MOLA and HS2, St James's burial ground data. Contains public sector information licensed under the Open Government Licence v3.0.
  3. A First World War roll of honour of the staff of C. & E. Morton Ltd
    Example: roll of honour, 1914–1919
    War record C. Cassidy

    Lance Corporal, Duke of Cornwall's Light Infantry. Listed among the dead in the War Office casualty list of 1919.

    National Library of Scotland, War Office Weekly Casualty Lists (public domain)

Showing 3 of 87 records for Cassidy in the United Kingdom.

Counts: Stirling Council. Contains public sector information licensed under the Open Government Licence v3.0. · National Library of Scotland, War Office Weekly Casualty Lists (public domain) · MOLA and HS2, St James's burial ground data. Contains public sector information licensed under the Open Government Licence v3.0. Example pages, not the records of the people shown: Burial register of Newtown, Montgomeryshire, 1858, National Library of Wales (CC0); C. & E. Morton Ltd roll of honour, 1914–1919, photo by Adrian S Pye via Geograph (CC BY-SA 2.0).

New Zealand66 records

66 records of the Cassidy name in New Zealand
  • Christchurch City cemetery records 57
  • Waimakariri District cemetery records, Canterbury 4
  • Other New Zealand records 5
  1. A page of the burial register of Newtown, Wales, 1858
    Example: burial register, 1858
    Burial record Peter Cassidy

    Died 1938, aged 91; buried at Linwood Cemetery, Christchurch, Canterbury.

    Christchurch City Council (CC BY 4.0)
  2. A page of the burial register of Newtown, Wales, 1858
    Example: burial register, 1858
    Burial record Francika Morta Cassidy

    Buried in 1969 at Totara Memorial Park Cemetery, Thames-Coromandel District, Waikato, aged 85.

    Thames-Coromandel District Council (CC BY 4.0)
  3. A page of the burial register of Newtown, Wales, 1858
    Example: burial register, 1858
    Burial record Myra Agnes Cassidy

    Died 1995; buried at Rangiora Lawn Cemetery, Canterbury.

    Waimakariri District Council (CC BY 4.0)

Showing 3 of 66 records for Cassidy in New Zealand.

Counts: Christchurch City Council (CC BY 4.0) · Waimakariri District Council (CC BY 4.0) · National Library of Scotland, War Office Weekly Casualty Lists (public domain) · Thames-Coromandel District Council (CC BY 4.0) · Marlborough District Council (CC BY 4.0). Example pages, not the records of the people shown: Burial register of Newtown, Montgomeryshire, 1858, National Library of Wales (CC0).

Ireland8 records

8 records of the Cassidy name in Ireland County Galway graveyard records
  1. A page of the burial register of Newtown, Wales, 1858
    Example: burial register, 1858
    Burial record Michael Cassidy

    Died 1900, aged 52; buried at Killererin (Old), Co. Galway.

    Galway County Council (CC BY 4.0)
  2. A page of the burial register of Newtown, Wales, 1858
    Example: burial register, 1858
    Burial record Julia Cassidy

    Died 1949, aged 84; buried at Dunmore, Co. Galway.

    Galway County Council (CC BY 4.0)

Showing 2 of 8 records for Cassidy in Ireland.

Counts: Galway County Council (CC BY 4.0). Example pages, not the records of the people shown: Burial register of Newtown, Montgomeryshire, 1858, National Library of Wales (CC0).

Netherlands3 records

3 records of the Cassidy name in the Netherlands
  • Dutch population registers 2
  • Dutch civil registers (births, marriages, deaths) 1
  1. A marriage entry in the civil register of Tilburg, 1911
    Example: marriage register, 1911
    Marriage record Agnes Doreen Cassidy

    Married in 1947 in Bloemendaal; office clerk.

    Open Archives, Noord-Hollands Archief (CC BY 4.0)
  2. A page of the 1910 United States census, Milwaukee
    Example: U.S. census, 1910
    Population register Edith Cassidy

    In the population register of 's-Gravenhage; born 1900 in Dundalk.

    Open Archives, Haags Gemeentearchief (CC BY 4.0)

Showing 2 of 3 records for Cassidy in the Netherlands.

Counts: Open Archives (CC BY 4.0). Example pages, not the records of the people shown: Marriage register, Tilburg, 1911, Regionaal Archief Tilburg (public domain); U.S. census of 1910, Milwaukee (public domain).

France1 record

1 record of the Cassidy name in France France's national death register, 1970–2001
  1. A page of the death register of Nice, 1930
    Example: French death register, 1930
    Death record Elizabeth Clarke Cassidy

    Born 1928 in the United States; died 2000 in Saint-Martin (Guadeloupe).

    Insee, Fichier des personnes décédées (Licence Ouverte)

Counts: Insee, Fichier des personnes décédées (Licence Ouverte). Example pages, not the records of the people shown: Death register of Nice, 1930, Archives départementales des Alpes-Maritimes (public domain).

Nearby in the index

Surnames next to Cassidy.

When the index is not enough

This page says where Cassidy is.
A volume says what happened to it.

Every page in the index is free and stays free. The Heritage Volume is the long form: the full paper trail, the arms, the crossing — bound, and yours.

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