Penelope Seidler

Penelope Alice Marjorie Seidler AO (née Evatt; born 1938) is an Australian architect and accountant. She is director of the Sydney based architectural firm Harry Seidler & Associates. She was the wife and professional partner of architect Harry Seidler (1923–2006). Together they designed Harry and Penelope Seidler House, which won the Wilkinson Award in 1967.

She has long been a patron of the arts, and as of April 2024 she is a member of the National Gallery of Australia Foundation Board.