Estonia has between 2,222 and 2,317 islands, depending on the most recent measurements and definitions. The number 2,222 is often cited based on earlier data, while newer aerial mapping has revealed an increase to 2,317 islands as of 2020. Additionally, if islands in lakes are included, the total can be around 2,355. Of these, only a few dozen are inhabited, with Saaremaa and Hiiumaa being the largest and most significant islands.