St Columba's Church, also known as Eaglais na h-Aoidhe or Ui Church, is a significant medieval site located in Aignish on the Isle of Lewis, Scotland. The oldest structures of the remaining church dates from the 13th century . The church is one of the few medieval remains on Lewis and is named after Columba or Columcille, a Celtic saint who lived in the 6th century.

Throughout its history, the church served as the principal place of worship during the medieval era and functioned as the burial ground for the Macleod chiefs and later the Mackenzies, who held dominion over the island.