Sheilagh Brown is a British fashion designer who began her career in the 1960s, as part of the Swinging London scene. She was among the designers for Stirling Cooper, working subsequently at Coopers and Quorum, before establishing the label Barnett and Brown with Sheridan Barnett.
She continued to design under her own name, both high-end fashion and for the high-street, as part of a collaboration with Jeffrey Rogers. At the end of the 1980s, Brown became head of womenswear design at Marks & Spencer. She remained in this role for more than a decade.