Carrigtwohill, officially Carrigtohill[9] /ˌkærɪɡˈtuːhɪl/ (Irish: Carraig Thuathail, meaning 'Tuathal's rock'), is a town in County Cork, Ireland with a population of 5,568 (2022).

[citation needed] It is generally believed that the town's name is from Irish: Carraig Thuathail, meaning 'Tuathal's rock'.

[9] 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.

[15] A number of multinational corporations have premises in the IDA Business Park to the west of the town, including GE Healthcare, Stryker, Merck Millipore,[16] Abbott Laboratories, Gilead Sciences and Rockwell-Proscon.

The local economy 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.

[17] A number of housing developments have been built in Carrigtwohill, including Castlelake to the west, Cluain Cairn and Cul Ard to the north.

[20] 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 also served by bus routes 240, 241 and 260 with connections to Youghal, Whitegate, Cloyne, Ballycotton and Ardmore.

[21] There is also a soccer club, Carrigtwohill United AFC,[22] which plays at Ballyadam, to the North East of the town.