Castlemaine is a village in County Kerry, Ireland. It lies on the N70 national secondary road between Killorglin and Tralee.

A national secondary road is a category of road in Ireland. These roads form an important part of the national route network but are secondary to the main arterial routes which are classified as national primary roads. National secondary roads are designated with route numbers higher than those used for primary roads, but with the same "N" prefix. Routes N51 and higher are all national secondary roads.