What is the #1 largest city in the US?

Could you please clarify for me which city holds the top spot as the largest city in the United States? I'm curious to know which metropolis boasts the highest population among all the cities in the country. Is it a coastal city, perhaps with a bustling port and a thriving economy? Or is it a landlocked metropolis, known for its cultural diversity and historical significance? I'm eager to learn more about this impressive city and its unique characteristics.