El Paso is the seat of El Paso County in the U.S. state of Texas and 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 is located at 31°47′25″N, 106°25′24″W (31.790208, -106.423242). It lies at the intersection of three states (Texas, New Mexico, and Chihuahua) and two countries (the USA and Mexico). It is the only major Texas city on Mountain Time. When Ciudad Juárez was on Central Time, it was possible to celebrate New Year's twice in the same evening by travelling a very short distance across the state and into another country. Both cities are now on Mountain Time.

As of the census of 2000, there were 563,662 people, 182,063 households, and 141,098 families residing in the city. The population density was 873.7/km² (2,263.0/mi²). There were 193,663 housing units at an average density of 300.2/km² (777.5/mi²). The racial makeup of the city was 76.6% White, 3.12% African American, 0.82% Native American, 1.12% Asian, 0.10% Pacific Islander, 18.15% from other races, and 3.40% from two or more races. Hispanic or Latino of any race were 76.62% of the population.