Rathnamagh is a townland within the civil parish of Kilfian and the historic barony of Tirawley, County Mayo in Ireland.[1] It borders Ballyneety, Lauvlyer, Rathmoyle, Greenwoodpark, Treangarrow to east, Fairfield and Woodville to west and Carrowgarve North to the south.[2] As of 2011, the townland had a population of 64 people (in 25 dwellings).[3] The local national (primary) school, Rathnamagh National School, had an enrolment of 12 pupils in 2024.[4]