Porterstown is an area in West Dublin in the Dublin 15 postcode area. Largely residential in nature, it is bordered by the larger areas of Clonsilla and Castleknock and is close to the M50 motorway. The Castleknock Hotel and Country Club is along the Porterstown Road, as well as a number of residential developments. Porterstown is also home to Luttrellstown Community College and Scoil Choilm Community National School. A railways line passes through it with stops at nearby Coolmine and Clonsilla.