Born in Kanturk, County Cork, the eldest son of Timothy Guiney, clerk of Kanturk Union. He was educated at St. Patrick’s Monastery, Mountrath, County Laois. He served three terms of imprisonment for activity in the Land War and later Plan of Campaign movement during the 1880s under the Coercion Act. He became a farmer and served as councillor for Newmarket and on the Cork County (1908–1911)  as well as Chair of Newmarket Agricultural Society, Newmarket Gaelic League Class and Newmarket Old-Age Pensions Committee.
With strong family connection in the North Cork area Guiney had built a personal political base as a Land and Labour Association activist skilled in organising land agitation and deploying it at a local level to make landlords agree sales terms under the 1902 Wyndham Land Purchase Act. Also as a supporter of William O'Brien's All-for-Ireland League he was elected MP for North-Cork in the January 1910 general election. He was re-elected in the following December 1910 general election when he also contested (unsuccessfully) for Kerry East.
He married Nanette O'Connor of Ballyclough, Mallow in 1895 and died at his home in Newmarket three years later on the 12 October 1913 and was buried in Clonfert Cemetery, Newmarket.
His brother John Guiney (1868–1926), who practiced as a solicitor in Kanturk, was returned unopposed for his seat in the resulting by-election. John was the father of David Guiney, one of Ireland's most versatile athletes. Patrick and John were uncles of Philip Burton (1910–1995), Fine Gael TD for Cork North–East 1961–69, and member of the Seanad 1973–77.
- "Historical list of MPs: constituencies beginning with "C", part 5". Leigh Rayment's House of Commons pages. Retrieved 6 December 2009.
- Cadogan, Tim & Falvey, Jeremiah: A Biographical Dictionary of Cork, p.117; Four Courts Press (2006), ISBN 978-1-84682-030-4
- Maume, Patrick: The long Gestation, Irish Nationalist Life 1891-1918, p.194, Gill & Macmillan (1999) ISBN 0-7171-2744-3
- The Times (London) Monday, October 13, 1913 p. 10 col. E
- Tim Cadogan & Jeremiah Falvey, A Biographical Dictionary of Cork (2006)
- Hansard 1803–2005: contributions in Parliament by Patrick Guiney
|Parliament of the United Kingdom|
James Christopher Flynn
|Member of Parliament for North Cork
January 1910 – 1913