Eagle Pass is a city in and the county seat of Maverick County in the U.S. state of Texas. The population was 26,255 as of the 2010 censusEagle Pass borders the city of Piedras Negras, Coahuila, Mexico, which is to the southwest and across the Rio Grande. The Eagle Pass-Piedras Negras Metropolitan Area is one of six binational metropolitan areas along the United States-Mexican border. As of January 2008, according to the US census, the Eagle Pass Metropolitan Area's population was 48,401 people, and the Piedras Negras Metropolitan Area's population was 169,771.