As of 2023, which country became the world's most populous nation with over 1.428 billion people? This Asian country recently surpassed its long-time rival to claim first place. Its population is more than four times that of the United States and nearly double that of all of Europe combined. The country has a median age of just 28 years, meaning more than half its population is under 28. Despite efforts to control growth through family planning policies, it continues to add millions of new residents each year. One in every six people on Earth lives here.

Which is the least populous member state of the United Nations, with approximately 59,000 residents? This tiny Pacific island nation gained independence in 2016. It consists of nine coral atolls with a total land area of just 26 square kilometers (10 square miles). The country is so small that its entire population could fit into a single major sports stadium. Rising sea levels threaten its existence – the highest point of land is only 5 meters above sea level. The nation's GDP is roughly $50 million, less than a single city block in New York City.

Which small European country has the highest population density in the world, with over 26,000 people per square kilometer? This microstate, with an area of just 2 square kilometers (0.77 square miles), is completely surrounded by a single other country. Despite its tiny size, it has its own monarchy, postal service, and Olympic team. More than 30,000 people live within its borders – that's the same population density as having the entire population of Australia crammed into the city of Melbourne. The country is famous for its casinos, luxury shopping, and Grand Prix street circuit.

Which European country has the most negative population growth rate, shrinking by over 1% annually? This Eastern European nation has been losing population since the 1990s due to very low birth rates and high emigration. Its population has fallen from 23.8 million in 1990 to under 19 million today. For every baby born, approximately two people die or leave. The country has an aging population, with a median age of 42 years. Many young people move to wealthier Western European countries for better opportunities. By 2050, its population is projected to drop to 14 million.

Which African country has the world's youngest population, with a median age of just 15 years? This nation, located south of the Sahara, has over 60% of its population under the age of 25. The median age is 15 – meaning half the population is younger than 15, half older. For comparison, the median age in Japan is 48 years, Germany 46 years, and the United States 38 years. This "youth bulge" creates both opportunities (a growing workforce) and challenges (need for education and jobs). The country's population is projected to quadruple by 2100.

Which country has the oldest population, with a median age of 48 years and nearly 30% of people over 65? This island nation has one of the lowest birth rates in the world (1.3 children per woman) and the longest life expectancy (over 84 years). The combination creates a rapidly aging society. The country sells more adult diapers than baby diapers. Its workforce is shrinking, leading to labor shortages and robotic innovations to care for the elderly. By 2050, it is projected that 40% of its population will be over 65 years old.

Which country currently has the fastest population growth rate, adding over 3% more people each year? This small Middle Eastern nation has seen explosive growth primarily due to immigration rather than births. Foreign workers make up nearly 90% of its population. The country has transformed from a poor fishing village to a wealthy metropolis in just 50 years. Its population has grown from 200,000 in 1980 to over 2.5 million today. Most residents are temporary workers who can never become citizens. The country is smaller than some cities but has one of the highest GDPs per capita globally.

In what year did the world's population reach 8 billion people? This recent milestone was announced by the United Nations. It took just 12 years to add the most recent billion people, compared to 123 years to go from 1 billion to 2 billion. The global population has quadrupled since 1927. Most growth is happening in Africa and Asia. Demographers predict the world will reach 9 billion around 2037 and 10 billion by 2058. However, growth is slowing – the annual growth rate has fallen from 2.2% in 1963 to less than 1% today.

Which country has the largest population in Europe, with over 146 million residents? This transcontinental nation spans both Europe and Asia, with about 77% of its population living in the European part. Despite its massive population, it has one of the lowest population densities in Europe because its Asian territory is mostly empty. The country has been experiencing population decline since the 1990s due to low birth rates and emigration. Approximately 73% of its people live in urban areas, with its capital being the largest city in Europe by population.

In which small country does over 50% of the entire national population live in a single city – the capital? This Middle Eastern nation is smaller than many cities, yet its capital dominates completely. The country has been independent since 1971. Its capital is one of the world's fastest-growing cities, attracting people from rural areas and neighboring countries for jobs. The second-largest city has fewer than 200,000 residents. The country has no permanent rivers and relies on desalination for water. Its population has exploded from 200,000 in 1970 to over 3 million today.