Mackays Stores Limited (previously Mackays, trading as M&Co.) is a Scottish chain store selling women’s, men’s, and children’s clothes, as well as small homeware products. Its head office is in Inchinnan, Scotland, though its main buying office is in London. Previously, its head office was at Caledonia House in Paisley.

Established in 1834 as pawnbrokers, Mackays switched to selling clothes in 1953 by brothers Len and Iain McGeoch. In 2005 the company rebranded as M&Co. to reflect a more modern image. The chain operates over 300 stores and also has an online presence.