23 countries in North America have a border with South America.
Step-by-step explanation:
- It has an overland border with the continent of South America which runs along the Panama-Colombia state boundary. In total there are 23officially recognized sovereign states in North America.
- At some point, the boundary between North America and South America falls on Panama's Isthmus.
- The most famous demarcation in atlases and other documents parallels the dividing watershed of the Darién Mountains along the Colombia-Panama border where the isthmus meets the continent of South America.