Carrigtwohill, officially Carrigtohill (Irish: Carraig Thuathail, meaning 'Tuathal's rock'), is a town in County Cork, Ireland with a population of 5,080 (2016). It is 12 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 the region, and a hub for pharmaceutical and biotechnology companies.