Tatiana "Tania" Baillayre (13 December 1916 – 1 January 1991) was a Romanian artist.
She was the daughter of French painter Auguste Baillayre, a professor and director (1939–1941) of the Museum of Fine Arts in Chișinău, and Lidia Arionescu-Baillayre [ro], also an artist.
Baillayre painted portraits, landscapes and still lifes.
Her paintings were shown in group exhibitions in France and the Soviet Union.
Her paintings were also included in exhibitions of Romanian art in China, the Soviet Union, Brazil, Sweden, and Italy.