Åland – part of Schengen
Citizens of the Nordic countries and countries that are signatories to the Schengen Agreement can come to Åland without a passport but should carry an identity card. Citizens of countries outside the EU/EEA should check the position with regard to their visa requirements before entry into Finland or Åland.
For instance, visitors from Russia should obtain a visa from the Finnish consulate in their home country before entry into Finland/Schengen.
Read more at Ministry for Foreign Affairs of Finland.
If you wish to stay in Åland longer in order to work or study, there are special rules and regulations that apply.