Mexico's Borders: Natural and Political Boundaries

Mexico shares borders with three nations and two major water bodies:

Land Borders

• United States (North): 3,145 km (1,954 mi)—Rio Grande (east), overland markers (west). World's most crossed border.
• Guatemala (South): 958 km (595 mi)—Suchiate River (west), overland (east)
• Belize (Southeast): 250 km (155 mi)—Hondo River (north), overland

Maritime Boundaries

• Pacific Ocean (West/South): 7,828 km coastline; EEZ 200 nm
• Gulf of Mexico / Caribbean Sea (East): 2,805 km coastline; EEZ to Cuba/US median lines

Boundary Types

• Natural: Rivers (Rio Grande, Suchiate, Hondo), mountain watersheds
• Artificial/Geometric: Straight-line segments (especially US border west of El Paso), coordinate-defined maritime limits
• Maritime: UNCLOS-defined EEZ, continental shelf

The US-Mexico border is the world's most traversed land boundary. Southern borders are less developed, with significant migration and trade flows.