Journalist and playwright. Nationalist MP 1884–1894. Died at home in Putney

Member of Parliament from 1884 to 1892, taking his seat in the House of Commons of the United Kingdom.

He was briefly married to the actress Cissie Loftus.

McCarthy wrote various novels, plays, poetical pieces and short histories:
Hafiz in London (1866)
England under Gladstone, 1880-1884 (1884)
The Case for Home Rule (1887)
Camiola, a Girl with a Fortune (1888)
Michel de Montaigne, Essayes of Montaigne (1899) Justin Huntly McCarthy Editor An outline of Irish history: from the earliest times to the present day (1890)
Lily Lass (1890)
Modern England (1898)
Cissie Loftus: An Appreciation (1899)
The French Revolution, (1899)
Reminiscences (2 vols., 1899)
A Short History of the United States (1899)
A Woman of Impulse (1899)
A History of the Four Georges (and of William IV) (1901) with Justin McCarthy
If I Were King (1901) Garden Theatre (New York), (1902) St James's Theatre (London)), which was named "Best Play of the 1901-02 Broadway Season",[7] and was adapted into the 1925 operetta The Vagabond King, its 1930 film version, its 1956 film version, and the 1938 film If I Were King.
The Reign of Queen Anne (1902)
Marjorie (1903)
The Proud Prince (1903)
The lady of Loyalty house (1904)
The Dryad (1905)
The flower of France (1906)
The illustrious O'Hagan (1906)
Needles and Pins (1907)
The Duke's Motto: A Melodrama (1908)
Seraphica: A Romance (1908)
The god of love (1909)
The gorgeous Borgia: a romance (1909)
The O'Flynn: A Novel (1910)
The king over the water: or, The marriage of Mr. Melancholy (1911)
A health unto His Majesty (1912)
Calling the Tune (1913)
Fool of April (1914)
The Glorious Rascal (Pretty Maids All in a Row) (1915)
Nurse Benson (1919)
Henry Elizabeth (1920)
The Golden Shoe (1921)
……….
Burials in plot WC 433
Gimson, Silvia Loullie buried 25 July 1966
McCarthy, Charlotte Ellen (Charlotte Ely) buried 9 November 1943
McCarthy, Justin Huntley buried 25 March 1936
McCarthy, Justin buried 27 April 1912
McCarthy, Charlotte buried 20 August 1879
REF. Deceased Online

Birth Reg
Name Justin Huntley McCarthy
Registration Date 1856
[1856]
Quarter of the Year Oct-Nov-Dec
Registration Place Liverpool, Lancashire, England
Volume 8b
Page 163

Marriage
Name Mr Justin Huntley McCarthy Mp
[Mr Justin Huntley McCarthy 's Mp]
Gender Male
Occupation Dramatist
Marriage Date 5 Sep 1894
Marriage Place Edinburgh
Father Justin McCarthy
Spouse Marie Cecilia Brown Loftu

1891 census
Name Justin H McCarthy
Gender Male
Age 30
Relationship Son
Birth Year 1861
Father
Justin McCarthy
Birth Place Liverpool
Civil parish Chelsea
Ecclesiastical parish St Luke
Residence Place Chelsea, London, England
Registration district Chelsea
Sub registration district Chelsea, South
ED, Institution or Vessel 7
Piece 64
Folio 50
Household Members
Justin McCarthy 60 Head
Justin H McCarthy 30 Son
Charlotte E McCarthy 25 Daughter
Elizabeth Salmon 26 Servant
Louisa Salmon 21 Servant
Edith A Hinson 19 Servant

1861 census
Name Saster H McCarthy
[Justin H McCarthy]
[Justin H McCarthy]
Gender Male
Age 4
Relation Son
Estimated Birth Year 1857
Father's Name Susten McCarthy
Mother's Name Charlotte McCarthy
Where born Liverpool, Lancashire, England
Civil parish Newington St Mary
Ecclesiastical parish St Paul
County/Island Surrey
Country England
Registration district Newington
Sub-registration district St Peter Walworth
ED, institution, or vessel 4
Household schedule number 69
Piece 338
Folio 68
Page number 12
Household Members
Justin McCarthy 30 Head
Charlotte McCarthy 29 wife
Justin H McCarthy 4 Son
Charlott E McCarthy 1 Daughter
Ellen Casey 17 Servant