Laredo–Nuevo Laredo

International transborder agglomeration in southern Texas and northwestern Tamaulipas Transborder AgglomerationLaredo–Nuevo LaredoTransborder AgglomerationLaredo BorderplexNicknames: "Four-State Area", "Los Dos Laredos", "Quad State Area"Interactive Map of Laredo–Nuevo LaredoTransborder Agglomeration City of Laredo Laredo, TX MSA City of Nuevo Laredo Municipio de Nuevo Laredo Largest cityLaredo, Texas Nuevo Laredo, TamaulipasOther citiesCampanarioRio BravoEl CenizoSubdivisionsTexasWebb County TamaulipasNuevo Laredo Municipality Nuevo LeónAnáhuac Municipality CoahuilaHidalgo MunicipalityArea • Total418.96 km2 (161.76 sq mi)Population (2010 official U.S. Census / INEGI Census) • Total636,516 • Estimate (2010)675,481 • Rank157th in the Americas (2008) • Density3,643/km2 (9,440/sq mi)GDP • LaredoUS $17.0 billion • Nuevo LaredoUS $5.5 billion • TotalUS $22.5 billionTime zoneUTC-6 Laredo–Nuevo Laredo (UN/LOCODE: USLRD & MXNLD), otherwise known as the "Four-State Area" or the "Quad State Area", is one of six transborder agglomerations along the U.S.-Mexican border. The city of Laredo is situated in the U.S. state of Texas on the northern bank of the Rio Grande and