Mizen Head (Irish: Carn Uí Néid), at the western extremity of the peninsula formerly known as the Ivagha Peninsula or Uíbh Eachach, is the south-westernmost point of Ireland, is one of the extreme points of the island of Ireland. It lies in west County Cork, Ireland, and is a tourist attraction. Located on the promontory are an old signalling station, a weather station, and a lighthouse. The signalling station, now a museum, is open to visitors. The "99 steps" are a long series of steps on the pathway across to the rocky outcrop upon which the station was built. The villages of Ballydehob, Goleen, and Schull are located on the peninsula.
Contrary to popular belief, Mizen Head is not the most southerly point on the mainland of Ireland. Nearby Brow Head holds that title. Nevetheless, geography books have long measured the length of Ireland "from Fair Head to Mizen Head" or "from Malin Head to Mizen Head.