El Paso ( ; from Spanish, "the pass") is a city in and the seat of El Paso County, Texas, United States. It is situated in the far western corner of the U.S. state of Texas. 

El Paso stands on the Rio Grande river across the Mexico–United States border from Ciudad Juárez, the largest city in the Mexican state of Chihuahua. The two cities, along with Las Cruces in the neighboring U.S. state of New Mexico, form a combined international metropolitan area sometimes referred to as the "Paso del Norte" or El Paso–Juárez–Las Cruces. The region of over 2.7 million people constitutes the largest bilingual and binational work force in the Western Hemisphere. 

The city is the headquarters of Western Refining, a Fortune 500 company, and three publicly traded companies, as well as home to the "Medical Center of the Americas", the only medical research and care provider complex in West Texas and southern New Mexico, and the University of Texas at El Paso, the city's primary university. The city hosts the annual Sun Bowl college football post-season game, the second oldest bowl game in the country. 

El Paso has a strong federal and military presence. William Beaumont Army Medical Center, Biggs Army Airfield, and Fort Bliss call the city home. Fort Bliss is one of the largest military complexes of the United States Army and the largest training area in the United States. Also headquartered in El Paso are the DEA domestic field division 7, El Paso Intelligence Center, Joint Task Force North, U.S. Border Patrol El Paso Sector, and U.S. Border Patrol Special Operations Group (SOG).
it is a city in which COUNTY?
 El Paso County