The Sweetest Illusion is the third solo studio album by Polish singer-songwriter Basia, released on 28 April 1994 by Epic Records.

Contrarily to Basia's previous albums, The Sweetest Illusion moves away from electronically generated music towards traditional live instruments.

Two songs on the album incorporate Polish language: in "An Olive Tree" Basia sings: "Oliwkowe drzewo może spełnić twe marzenia" (English: "An olive tree can make your dreams come true") and towards the end of "Yearning", she sings the opening line from a Polish folk song: "Szła dzieweczka do laseczka, do zielonego".

The track was accompanied by a music video directed by Howard Greenhalgh, in which Basia and her two nieces appeared in Polish folk costumes.

In 2016, the album was re-released by independent UK label Cherry Red Records as three-CD deluxe edition featuring instrumental versions and remixes.