Ballycorus (Irish: Baile Mhic Fheorais, meaning "Town of the Pearse Family") leadmines is a former lead mining and smelting centre located in the townland of the same name, near Kilternan in County Dublin, Ireland. The mine opened around 1807 and was taken over by the Mining Company of Ireland (MCI) in 1826 who owned and operated the site up until closure in 1913. After the mine was exhausted in the 1860s, Ballycorus continued to operate as a smelting facility receiving ore from other MCI sites such as the mines in Glendalough, County Wicklow. The most distinctive surviving remnant of the site is the ruin of the flue chimney that lies close to the summit of Carrickgollogan hill.