The Korean National Railroad (Hanguk Cheoldo (한국 철다; 韓國鐵道) or Gukcheol (국철; 國鐵) for short in Korean) is the national railroad operator in South Korea.
The KNR operates passenger and freight trains troughout South Korea. The railroad's headquarters (Cheoldocheong (철도청; 鐵道廳)) are located at Yongsan, a neighbourhood of Seoul. See Transportation in South Korea for more information.