Kornsjø Station (Norwegian: Kornsjø stasjon, Swedish: Kornsjö järnvägsstation) is a railway station located at Kornsjø in Halden, Norway, on the Østfold Line. The station is located 1 kilometre (0.62 mi) from the Norway–Sweden border and was opened in 1879 for changing crew on international trains between Sweden and Norway and for the customs office. The building was destroyed by fire in 1898 and a new larger stone building was built.