Houston, Texas is the largest city in Texas and the 4th largest city in the United States. The population of Houston is 2,239,558, and in 2015 Forbes named Houston the fastest growing city in the nation. Houston has a distinctly favorable business climate. The region benefits from a skilled workforce, world-class infrastructure and transportation system, and a pro-business environment that stimulates business growth. Houston is home to the Texas Medical Center, the largest medical center in the world, and boasts more than 40 colleges, universities and institutions. 26 fortune 500 companies are headquartered in Houston including Phillips 66, Sysco, Enterprise Product Partners and Halliburton.