Yvonne Jammet (1900 – 30 August 1967) was a French landscape painter and sculptor, who spent her career in Ireland.
She married her third cousin, Louis Jammet, with whom she moved to Dublin in 1928 to take over running of his father's restaurant on Nassau Street.
As an artist, and patron and arts, Jammet decorated the restaurant, most notably the remodelling of the upstairs in 1946 with architect Noel Moffet to a minimalist looks with curved glass-block screens and exposed steelwork.
Through his staging of a number of French plays in autumn 1938 at the Gate Theatre, Micheál MacLiammóir became close friends with the Jammets.
MacLiammóir described Jammet as "exquisite, dark and smiling, a portrait by Renoir miraculously come to life in the glooms of twentieth-century Dublin.