Thomas Power O'Connor (5 October 1848 – 18 November 1929), known as T. P. O'Connor and occasionally as Tay Pay (mimicking his own pronunciation of the initials T. P.), was a journalist, an Irish nationalist political figure, and a member of parliament (MP) in the House of Commons of the United Kingdom of Great Britain and Ireland for nearly fifty years.
O'Connor was born in Athlone,County Westmeath, on 5 October 1848. He was the eldest son of Thomas O'Connor, an Athlone shopkeeper, and his wife Teresa Power, the daughter of a non-commissioned officer in the Connaught Rangers. He was educated at the College of the Immaculate Conception in Athlone, and Queen's College Galway, where he won scholarships in history and modern languages and built up a reputation as an orator, serving as auditor of the college's Literary and Debating Society.
O'Connor entered journalism as a junior reporter on Saunders' Newsletter, a Dublin journal, in 1867. In 1870, he moved to London, and was appointed a sub-editor on The Daily Telegraph, principally on account of the utility of his mastery of French and German in reportage of the Franco-Prussian War. He later became London correspondent for The New York Herald.
O'Connor was elected Member of Parliament for Galway Borough in the 1880 general election, as a representative of the Home Rule League (which was under the leadership of William Shaw, though virtually led by Charles Stewart Parnell, who would win the party's leadership a short time later). At the next general election in 1885, he was returned both for Galway and for the Liverpool Scotland constituencies, which had a large Irish population. He chose to sit for Liverpool, and represented that constituency in the House of Commons from 1885 until his death in 1929. This was the only constituency outside the island of Ireland ever to return an Irish Nationalist Party MP. O'Connor continued to be re-elected in Liverpool under this label unopposed in the 1918, 1922, 1923, 1924 and 1929 general elections.