The Unsan Line is a former non-electrified narrow gauge line of the Korean State Railway in North P'yŏngan Province, North Korea, running from Puksinhyŏl-li, Hyangsan County on the Manp'o Line to Samsal-ri, Unsan County.

[1] The Unsan Line was originally opened by the Korean State Railway in the 1970s;[2] it was closed some time in the 1990s.

Trains on the line were pulled by Czechoslovakian-built 400 series 0-6-0T steam tank locomotives.

[3] By December 2003, there was little that remained of the line, with only the bridge abutments leaving Puksinhyon station being visible and no buildings or locomotives seen.

[4] A yellow background in the "Distance" box indicates that section of the line is not electrified; a pink background indicates that section is 2 ft 6 in (762 mm) narrow gauge; an orange background indicates that section is non-electrified narrow gauge.