Houston is the most populous city in the U.S. state of Texas. It is the 4th most populous city in the United States. As of 2020, more than 2 million people lived there. John Whitmire became the mayor of Houston in 2024. Houston is named after Samuel Houston, who fought for Texas to leave Mexico in 1836. The Johnson Space Center of NASA is in Houston.
Houston has the largest medical center and complex in the world, the Texas Medical Center.