Which countries border South Korea?
South Korea shares a land border with only one country: North Korea. That is the fewest a country with a land border can have.
South Korea and its neighbours on a map
South Korea is shown in green and its neighbour in blue. Click a neighbour to see the countries that border it.
- South Korea
- Land neighbours
Every neighbour of South Korea
| Country | Its own land neighbours |
|---|---|
| North Korea | 3 |
Two borders away
These two countries border a neighbour of South Korea but not South Korea itself, so you cross exactly two borders to reach them by land.
Think you know your neighbours?
Border Chain gives you two countries and you connect them by naming neighbours, one border at a time. A new puzzle every day.
How far are you from South Korea?
On a phone this uses GPS. The calculator opens with South Korea already selected and measures the straight-line distance to its nearest border.
Questions
Which countries border South Korea?
South Korea shares a land border with only one country: North Korea.
How many countries border South Korea?
One. That is the fewest a country with a land border can have.
Which countries are two borders away from South Korea?
China and Russia. Each one borders a neighbour of South Korea without touching South Korea itself.
Are borders across the sea counted?
No. Only land borders count. Countries that face South Korea across water are not listed here, and neither are borders of overseas territories far from the mainland. This is the same list the Border Chain game plays with.
Countries with the most neighbours
Land borders as used by the Border Chain game, checked October 8, 2026. Country outlines from Natural Earth.