Tallinn is the 59th most populous city in the European Union.

An excerpt from the article 27 facts about Tallinn

According to Eurostat, in 2004 Tallinn had one of the highest numbers of non-European Union citizens of all member state capitals. However, Russians constituted a significant minority - approximately one-third of Tallinn's inhabitants are immigrants of Russian origin, most of whom currently have Estonian citizenship.

In 2020, ethnic Estonians constituted over 52% of Tallinn's population (before World War II it was over 80%).