Rathangan (Irish: Ráth Iomgháin, meaning "Iomghan's Fort") is a town in the west of County Kildare, Ireland, with a population of 1,718. It is located 65 km (40 mi) from the centre of Dublin, and 14 km (8.7 mi) from Kildare, at the intersection of the R401, R414, and R419 regional roads. The Slate River and the Grand Canal run through the town.