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In page Danube Delta:

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With an average population density of 2 people per km2, the Danube Delta is one of the least inhabited regions of temperate Europe.[1] On the Romanian side live about 20,000 people, of whom 4,600 live in the port of Sulina.[citation needed]. The rest of the population is scattered among 27 villages, of which only three, all situated marginally, had more than 500 people in 2002.[citation needed] The city of Tulcea, at the western edge of the delta, has a population of 65,624 as of 2021; it represents the node of the region and the gate to the delta.[1]