Samuel Young (26 February 1822 – 18 April 1918) was an Irish brewer and Protestant nationalist politician. He was Member of Parliament (MP) for East Cavan from 1892 until 1918, becoming oldest serving member of the House of Commons of the United Kingdom of Great Britain and Ireland.
Born in Dunevelly, near Portaferry in County Down, Young grew up in a Church of Ireland family and attended the Old Presbyterian School in Belfast before becoming a draper, eventually coming to run his own store. In 1872, he went into partnership to open a brewery in Limavady. Among his employees was future Nationalist Party leader Joseph Devlin.
Despite his Protestant faith, Young supported the disestablishment of the Church of Ireland, and the cause of Home Rule. With Devlin's support, he was elected for the anti-Parnellite Irish National Federation in East Cavan at the 1892 general election. Already seventy years of age, he won the seat with a majority of nearly six to one over his Unionist opponent. In 1894, he founded the Ulster Liberal Land Committee, while in 1896 he sat on the Royal Commission for Liquor Licensing Laws.