Explore United States of America - A Nation of 336997624 People. United States of America (US) is a diverse and thriving country spanning 9629091 km² (3717792 sq mi). With a population density of 35 people per km², it offers a unique blend of cultural heritage, economic opportunities, and breathtaking landscapes. Whether you're interested in tourism, business, or history, United States of America stands out as a global destination. Stay informed about United States of America’s geographic insights, demographic trends, and more. Discover why United States of America is a key player on the world stage today!