Brazil's Borders: A Complete Geographic Breakdown

Brazil occupies nearly half of South America, sharing borders with every South American nation except Chile and Ecuador. Its boundaries are:

North

• Atlantic Ocean (coastline).
• French Guiana (France) – Oyapock River.
• Suriname – Courantyne River / watershed.
• Guyana – Ireng/Takutu Rivers.
• Venezuela – Orinoco basin / watershed.
• Colombia – Amazon rainforest / Vaupés River.

South

• Atlantic Ocean (Rio Grande do Sul coast).
• Uruguay – Quaraí River / Lagoa Mirim.
• Argentina – Iguaçu River / Paraná River / watershed.

East

• Atlantic Ocean — 7,491 km (4,655 mi) of coastline.

West

• Peru – Amazon basin / Yavarí River.
• Bolivia – Madeira River basin / wetlands.
• Paraguay – Paraguay River / Apa River.
• Argentina – (Also touches SW corner via Iguaçu/Paraná).
• Uruguay — (Does not border Brazil directly in the west; only south. Original source listed it twice; corrected here.)

Total land borders: ~16,000 km. 10 neighboring countries (France via French Guiana counts). The Amazon Basin dominates the north/west; the Paraná/Paraguay basin the south/west.