Brazil shares land borders with 10 countries — every South American nation except Chile and Ecuador.
| Country | Border Length | Key Crossing / Feature |
|---|---|---|
| Uruguay | 1,068 km | Chuy / Chuí (southern tip) |
| Argentina | 1,261 km | Iguaçu Falls, Paso de los Libres–Uruguaiana |
| Paraguay | 1,365 km | Friendship Bridge (Foz–Ciudad del Este) |
| Bolivia | 3,423 km | Corumbá–Puerto Suárez (Pantanal) |
| Peru | 2,995 km | Assis Brasil–Iñapari (Interoceanic Hwy) |
| Colombia | 1,644 km | Tabatinga–Leticia (Amazon tri-border) |
| Venezuela | 2,200 km | Santa Elena de Uairén–Pacaraima (Roraima) |
| Guyana | 1,606 km | Lethem–Bonfim (Rupununi savanna) |
| Suriname | 593 km | Albina–Saint-Laurent (Maroni River) |
| French Guiana (France) | 730 km | Oiapoque River bridge (2017) — EU border in Amazon |
16,885 km (10,492 mi) — world's 3rd longest total land border (after China, Russia).
French Guiana is an overseas department of France (EU territory), not a sovereign country — but it is a distinct political entity with a border. Count it or not depending on definition. Sovereign states = 9. Territories = 10.
Either way: Brazil is the continent's great neighbor.