Barbados is the most densely populated country out of the four on the list. There are 287,400 people in the country, spread over the country with 660 people to every square kilometer, or 1,704 people to every square mile. The population density of a country is defined as the number of people in a certain area - usually either a square mile or a square kilometer.
This is found by dividing the total area of the country by the number of people.
This country is located in the Caribbean sea, and was a British colony. Now, it is an independent country, and has an interesting history for the colonial era. The country was left unclaimed until the English came.