Signy Hildur Eaton (née Stefansson; July 1, 1913 – September 10, 1992) was a Canadian socialite, art collector and philanthropist.
In 1933, Lady Eaton presented her to King George V and Queen Mary at Buckingham Palace.
In 1937, the Eatons built a Bauhaus style residence designed by Alvan "Shy" Mathers and Eric Haldenby at 120 Dunvegan Road in the Toronto neighbourhood of Forest Hill.
Signy filled their Forest Hill home with works by Pablo Picasso, Maurice Utrillo, Raoul Dufy, Thelma van Alstyne, Marc Chagall, Georges Rouault, Jean-Paul Riopelle and Roloff Beny.
Her vast art collection was divided among her four sons and some pieces were sold at Sotheby's in 1994 and 1995.