Alexander Paterson O'Shea (29 December 1902 – 24 December 1990) was a New Zealand shepherd, clerk, farmers’ union leader, political lobbyist and meat industry representative. He was also a member of the New Zealand Legislative Council.
He was born in Dunedin, Otago, New Zealand in 1902 to John O’Shea, a law clerk, and his wife, Alice Marion Clark. He attended Otago Boys' High School where he excelled and initially intended to pursue a legal career. However, in 1918 he suffered a bout of pneumonia and for a better chance of his health recovering he went to work in agriculture instead. He later moved to Wellington and in 1928 he began part-time study at Victoria University, graduating in 1936 with a Bachelor of Commerce degree.
He married Vera Isabell Cooper (an arts student) on 12 February 1935; they had one daughter together.
O’Shea became dominion secretary of the New Zealand Farmers’ Union in September 1935. O’Shea immediately began a strong recruitment campaign, making regular personal visits to all the provinces, encouraging them to join and strengthen their finances. He always believed in free-trade ideals, arguing that protectionist measures and import licensing worked against New Zealand's agricultural trade. From 1964 to 1968 he took up a new position with the New Zealand Meat Producers’ Board, as their marketing representative for North America.
He was appointed as a member of the New Zealand Legislative Council in 1950 by Prime Minister Sidney Holland as part of the suicide squad selected by the First National Government to vote for the abolition of the Council. Most of the new members (like O’Shea) were appointed on 22 June 1950, and served until 31 December 1950 when the Council was abolished.
O'Shea later became the President of the Wellington Citizens' Association, a right wing local body electoral ticket. He stood as their candidate for the Wellington Mayoralty in 1971, but lost to Labour's Frank Kitts.