Houston is the largest city in the state of Texas and has the fourth-largest population among cities in the United States. As of July 1, 2006, the U.S. Census Bureau estimates the Houston population at 2,144,491, in an area covering more than 600 square miles. Houston is the county seat of Harris County and part of the Houston–Sugar Land–Baytown metropolitan area, the sixth-largest metropolitan area in the U.S., with a population of more than.5 million. Houston apartments for rent comparison page shows most up to date rent information on Houston apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.