Carrigtwohill, officially Carrigtohill (Irish: Carraig Thuathail, meaning "Tuathal's rock"), is a town in County Cork, Ireland with a population of 6,665 (2011). It is 16 kilometres east of Cork city. It is connected to Cork Suburban Rail and is bypassed by the N25 road. Carrigtwohill is one of the fastest growing towns in Ireland and is a major pharmaceutical and biotechnology hub.
It is generally believed that the town's name is from Irish: Carraig Thuathail, meaning "Tuathal's rock". However, in his book Church and Parish Records (1903), the Rev. J.H. Cole of the Church of Ireland said that tuathail is used in the sense of "left-handed", or "North". Cole says it is so called because, whereas most of the rocks in that part of the country run east-west, the rocks at Carrigtwohill run north-south.
The town's anglicised name first appeared in written documents in 1234 as Karrectochell. Later spellings include Carrigtuoghill, Carrigtoghill, Carrigtowhill and Carrigtowill.
Places of interest
The huge rock from which Carrigtwohill derives its name is about half a mile north-eastwards of the town itself, and is in the townland of Carrigane. The rock is honeycombed with caves; some are very large and extend for miles underground where very beautiful stalactites are to be found. Tradition has it that a goat once entered one of these caves, emerging in the townland of Ballintubrid, a few miles southwards. The cave where the goat emerged is called Poll an Ghabhair, meaning The Goat’s Hole.
The town is the home of Barryscourt Castle. The castle was originally built in the 12th century and rebuilt in the 16th century. The castle grounds house a cafe and a gift shop. It was extensively refurbished between 1991 and 2006. Tours are held daily during the summer months.
Fota Island is also located in Carrigtwohill. This island is home to Ireland's only Wildlife Park, and also the restored Fota House and Arboretum. Fota Island Resort includes the 5 star Fota Island Hotel, as well as two championship golf course, on which the Murphys Irish Open was played in 2006.
Ireland's only permanent drive-in cinema, "Movie Junction", is located in Fota Retail Park to the west of the town. It opened on 19 November 2010, expanding to a second screen in 2013. 
Many large corporations have premises in the IDA Business Park to the west of the town, including GE Healthcare, Stryker Corp., PAS Technologies, Merck Millipore, Abbott Laboratories, Gilead Sciences and Rockwell-Proscon. The town was dealt a blow in October 2007 when the biotechnology giant Amgen scrapped indefinitely its partially constructed plant at Ballyadam on the outskirts of Carrigtwohill.
Many housing developments have been developed in Carrigtwohill, including Castlelake to the west, Cluain Cairn and Cul Ard to the north. International supermarket giant Aldi has a presence in the Castlesquare retail development, part of the Castlelake development.
A second station, Carrigtwohill West, is planned to serve the west of the town, including Fota Retail Park, and the IDA Industrial and Business area.
The original Carrigtwohill railway station was opened on 2 November 1859, closed for goods traffic on 2 December 1974 and fully closed from 6 September 1976. A new station was officially opened on 30 July 2009 on the north of the town, with Park n' Ride facilities for commuters travelling to Cork City.
Carrigtwohill is covered with an extensive bus service, on route 261 from Cork to Midleton. Carrigtwohill is also served by bus routes 240, 241 and 260 with connections to Youghal, Whitegate, Cloyne, Ballycotton and Ardmore.
Gaelic Athletic Association is well supported in Carrigtwohill. The GAA have excellent facilities in the town, with a modern gymnasium, added to three playing pitches, two of which are floodlit. Carrigtwohill have a Senior hurling team, having won the Cork County Premier Intermediate Hurling championship in 2007. In 2011 Carrigtwohill won the county final, the first time since 1918.
There is also a soccer club, Carrigtwohill United AFC . The club plays at Ballyadam, to the North East of the town. They have several pitches and dressing rooms at Ballyadam.
Various clubs active in Carrigtwohill include Glenmary Basketball Club, Carrigtwohill Badminton Club, an Athletics club and a Tennis club.
The renowned Irish athletes Ailis MacSweeney and Shane Healy are natives of Carrigtwohill.
The Gaelic poet Dáibhí Ó Bruadair came from the Carrigtwohill area. The British writer Gerald Heard spent part of his childhood in his paternal grandmother's home in Ballintubber, Carrigtwohill.
- Census for post 1821 figures.
- Lee, JJ (1981). "On the accuracy of the Pre-famine Irish censuses". In Goldstrom, J. M.; Clarkson, L. A. Irish Population, Economy, and Society: Essays in Honour of the Late K. H. Connell. Oxford, England: Clarendon Press.
- Mokyr, Joel; O Grada, Cormac (November 1984). "New Developments in Irish Population History, 1700-1850". The Economic History Review. Volume 37 (4): 473–488. doi:10.1111/j.1468-0289.1984.tb00344.x.
- Placenames Database of Ireland
- CSO 2011Page 86
- CSO 2011
- "Amgen shelves plans to build drugs plant in Ireland". Reuters. 3 October 2007.
- "Carrigtwohill station". Railscot - Irish Railways. Retrieved 2007-08-30.
- Leland, Mary (1999). The lie of the land: journeys through literary Cork. Cork University Press. p. 28-29. ISBN 978-1-85918-231-4.
- "Biography", Gerald Heard Official Website
- Coleman, J. C.; Stelfox, A.W. (Sep 1945). "Excavation at Carrigtwohill Caves, Co. Cork". Irish Naturalists' Journal 8 (8): 299–302. JSTOR 25533361.
|Wikimedia Commons has media related to Carrigtwohill.|
- Central Statistics Office (Ireland): Census 2006 Reports - Published To Date
- Carrigtwohill Community Council
- Carrigtwohill Family Resource Centre
- Carrigtwohill United AFC, soccer club
- Carrigtwohill GAA Club
- Carrigtwohill Badminton Club
- Irish Rail Carrigtwohill Station Website
- Heritage sites (Ireland): Barryscourt Castle (Cork)