Margaret Seguier (née Stewart; 1795–1870) was a British miniature painter.
[1][2] Their father taught both Margaret and her younger sister, Grace Campbell Stewart, to paint.
[1][2] Margaret is praised in contemporary accounts for her portrait miniatures but no artistic record or specific attributions exist.
[2] Margaret married John Seguier, 1785–1856, who was a picture restorer and supintendent at the British Institution.
They had a son, Peter Seguier who became a successful author, writing A Critical and Commercial Dictionary of the Work of Painters.