From the 13th to 20th century, there were Swedish-speaking communities in Estonia, particularly on the islands (e.g., Hiiumaa, Vormsi, Ruhnu; in Swedish, known as Dagö, Ormsö, Runö, respectively) along the coast of the Baltic, communities which today have all but disappeared.
From 1918-1940, when Estonia was independent, the small Swedish community was well treated.