The N25 road is a national primary road in Ireland, forming the route from Cork to Rosslare Europort via Waterford City. The road is part of the E30 European route and a short section is also part of the E01 European route. It forms part of the proposed Atlantic Corridor route.

Carrigtwohill, officially Carrigtohill, is a town in County Cork, Ireland with a population of 5,568 (2022). It is 12 kilometres east of Cork city centre. 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. Carrigtwohill is part of the Cork East Dáil constituency.