Which country borders South Korea to the north?

South Korea is bordered to the north by the Democratic People’s Republic of Korea, commonly known as North Korea.1

The two countries are separated by a demilitarized zone (DMZ), which was established following the 1953 armistice that ended the fighting in the Korean War. This zone, which runs for approximately 150 miles (240 km) across the peninsula, roughly follows the 38th parallel.12