Glasnevin is a neighbourhood of Dublin, Ireland, situated on the River Tolka. While primarily residential, Glasnevin is also home to the National Botanic Gardens, Glasnevin Cemetery, the National Meteorological Office, and a range of other state bodies, and Dublin City University has its main campus and other facilities in and near the area. Glasnevin is also a civil parish in the ancient barony of Coolock.

The River Tolka, also once spelled Tolga, is one of Dublin's three main rivers, flowing from County Meath to Fingal within the old County Dublin, and through the north of Dublin city, Ireland. By flow of water, the Tolka is the second largest river in Dublin, following the Liffey, but runs more slowly than the Dodder.