Rathdown School is an independent day and boarding school in Glenageary, Dublin, Ireland operating under the management of a charitable trust and with a Protestant but inclusive ethos. For most of its history an all-girls school, it became co-educational in 2023. Rathdown provides pre-school, junior and senior level education. Located on a 16-acre site, about 12 kilometres from Dublin City Centre. Rathdown is consistently ranked among the top schools in Ireland. The school's colours are blue and green.