How international is Maastricht? According to the City Council of Maastricht, there were 16,933 non-Dutch residents registered in the city, as of 31 December 2015 — making up 13.8% of the population. Non-Dutch citizens living in Maastricht come from a diverse range of countries. In fact, 153 nationalities knit together the fabric of Maastricht today. A diversity of languages are also spoken in Maastricht – at least 63. Excluding non-Dutch citizens originating from a country where Dutch is ...