British politician, publicist, and noted wit who gained journalistic fame with his dispatches from Paris (for the Daily News, London, of which he was part owner) while the city was under siege during the Franco-German War (1870–71). The dispatches, which he sent via balloon to Henrietta Hodson, an actress whom he later married, were widely read and later published as Letters of a Besieged Resident (1872). He also helped to expose (1889) the Irish journalist Richard Pigott as the forger of an incriminating letter ostensibly written by the Irish nationalist leader Charles Stewart Parnell.

The grandson of a financier whose fortune he inherited, Labouchere served in the British diplomatic corps (1854–64) and then sat in the House of Commons as a Liberal (1865, 1867–68) and as a Radical (1880–1906). He urged the abolition of the House of Lords and opposed the expansionism of Joseph Chamberlain and other Liberal imperialists that led to the South African War (1899–1902). His periodical Truth (founded 1877) was devoted to the exposure of organized frauds.