Slemish, historically called Slieve Mish[1] (from Irish Sliabh Mis, meaning 'Mis's mountain'),[2] is a hill in County Antrim, Northern Ireland.

Tradition holds that Saint Patrick, enslaved as a youth, was brought to this area and tended sheep herds on Slemish, and that during this time he found God.

[5] Its distinctive appearance —its upper reaches are very steep and rugged, in contrast to the tidy fields on its lower westward-facing slopes and the relatively flat bogland to the east— causes it to dominate the landscape for miles around.

[6] According to legend, following his capture and being brought to Ireland as a slave, Patrick worked as a shepherd at Slemish Mountain for about six years,[7] from ages 16 to 22, for a man named Milchu (or Miluic).

Ballymena town, Lough Neagh and the Sperrin Mountains are all normally visible to the west whilst the Bann Valley and the higher summits of the Antrim Hills can be seen to the North.