The Sjundeå station was opened for traffic on 1 September 1903, and its station building, designed by
Bruno Granholm, was finished in the same year. The station had its Finnish name officialized in June 1925. The station was on the area of the territory of the Soviet
Porkkala Naval Base, established as a result of the
Moscow Armistice in 1944. As Porkkala was returned to Finnish control in 1956, Siuntio was re-established first as a halt on 1 May 1956; it was upgraded to a staffed
laiturivaihde — a halt with a railyard with at least one
switch — just one month later after the renovation of the station building was completed. == Services ==