The country with a population of 27 is Sealand, a self-proclaimed micronation located in the North Sea, about 10 kilometers from England. Sealand is situated on a former World War II sea fort, covering an area of 550 square meters. It was declared a sovereign country in 1967 by Paddy Roy Bates and has its own flag, currency, and even an army.
While Sealand's sovereignty is disputed by many nations, it remains a fascinating example of a micronation with its own unique history and culture.