El Paso is the county seat of El Paso County in the U.S. state of Texas. Part of the American Southwest. According to the 2006 U.S. Census population estimates, the city had a population of 609,415. It is the sixth-largest city in Texas and the 21st-largest city in the United States. Its metropolitan area covers all of El Paso County and has a population of 736,310. El Paso apartments for rent comparison page shows most up to date rent information on El Paso apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.