Maria Keil was a Portuguese artist. She was born in Silves and died in Lisbon.
Maria Keil produced a vast and diversified work that includes painting, drawing and illustration, azulejo, graphic and furniture design, tapestry and scenography. Particularly noteworthy is her intense activity as an illustrator, as well as the crucial role she played in the renovation of contemporary tiles in Portugal.
In 2013, the Museum of the Presidency of the Republic organized a retrospective exhibition covering the multiple aspects of her work. It has a library named after her in Lisbon at Lumiar.