Compulsory voting
, 22 countries were recorded as having compulsory voting. Of these, only 10 countries (additionally one Swiss canton and one Indian state) enforce it. Of the 30 member states of the Organisation for Economic Co-operation and Development, 10 had forms of compulsory voting.
Right of foreigners to vote
A number of separate supranational groupings of countries exist, and membership in some of these groupings may involve multinational agreements and treaties in which member countries agree to some degree of reciprocity regarding voting rights. Some individual countries are members of more than one supranational groupings, and some supranational groupings of countries are members of other supranational groupings of countries.