Which are the largest European Union cities by urban area population that are located at the coast.
Based on this page: https://en.wikipedia.org/wiki/List_of_urban_areas_in_the_European_Union
Main source (2022) - urban areas; Demographia
Secondary Wikipedia urban area sources were used if urban areas were incorrectly defined (e.g. metropolitan area or agglomeration instead of urban area)
Note: one city is sometimes grouped together with another larger city in the same metropolitan area, but both are separate urban areas