Land boundaries: total: 1,607 km
border countries (3): China 1,352 km, South Korea 237 km, Russia 18 km
Definition: This entry contains the total length of all land boundaries and the individual lengths for each of the contiguous border countries. When available, official lengths published by national statistical agencies are used. Because surveying methods may differ, country border lengths reported by contiguous countries may differ.
Source: CIA World Factbook - This page was last updated on July 9, 2017