Grangegorman is an inner suburb on the northside of Dublin city, Ireland. The area is administered by Dublin City Council. It was best known for decades as the location of St Brendan's Hospital, which was the main psychiatric hospital serving the greater Dublin region. As of 2020, the area is the subject of a major redevelopment plan, running for more than a decade, under the aegis of the Grangegorman Development Agency, including the new Technological University Dublin campus.