According to the same census, three departments bordering Paris, Hauts-de-Seine, Seine-Saint-Denis and Val-de-Marne, had population densities of over ten thousand people per square kilometre, ranking among the ten most densely populated areas of the EU.
What three departments surrounding Paris had densities greater than 10k/k?
Hauts-de-Seine, Seine-Saint-Denis and Val-de-Marne