The Kirk of St Nicholas is a historic church in Aberdeen, Scotland. It is the original parish church of the city, and is also known locally as the Mither Kirk or mother church. Following the Reformation, it was divided between two congregations, the East Kirk and the West Kirk. These merged in the 1980s to form the Kirk of St Nicholas Uniting. In 2020, the congregation merged with that of Queen's Cross Church and the Kirk of St Nicholas ceased to be used for regular worship. The West Kirk is now owned by Scot-ART.