Glencullen (Irish: Gleann Cuilinn ) is two townlands in the parish of Kiltane in County Mayo, Ireland, situated to the north of Bangor Erris, next to the parish of Kilcommon, Erris which is in the Gaeltacht area. The townlands are located in an area of blanket bog extending across some 2,108 acres (Glencullen Lower) and 2,792 acres (Glencullen Upper), so almost in total. The main Bangor - Kilcommon road runs through Glencullen. The nearest reasonably large town is Belmullet.