Mahon is an area to the south-eastern side of Cork, Ireland. Mahon gets its name from Lough Mahon, a wide stretch of the upper section of Cork Harbour. It was once a semi-rural peninsula, but from the late 20th century was subject to residential development, and has a number of housing estates and developments. The area was generally known as the Ring of Mahon, and is the site of Ringmahon House. Mahon is within the Cork South-Central Dáil constituency.