Cornelscourt has an area of 44.95 hectares. It stretches west to Kerrymount Avenue, south to the Old Bray Road, and east across the N11 to include all of Monaloe (directly behind Clonkeen College).
Cornelscourt's boundaries are defined by Kerrymount Avenue (west), the Old Bray Road (south), and the N11 highway (east). It encompasses all of Monaloe, situated behind Clonkeen College.