What 2 countries have the highest population density?

The two countries with the highest population density are Monaco and Singapore.

Monaco has a population of about 37,000 people and a land area of about 2.02 square kilometers, which gives it a population density of about 18,500 people per square kilometer.

Singapore has a population of about 5.8 million people and a land area of about 728.6 square kilometers, which gives it a population density of about 7,950 people per square kilometer.