Viking Sebastian Henricsson Tamm (21 July 1896 – 25 November 1975) was a Swedish Army officer.
In addition to the years he served in the Swedish Army, Tamm led a group of Swedish officers who developed the Ethiopian military school's officer training (1934–36 and 1945–46) and he was a volunteer in the Winter War in Finland in 1940 commanding the II.
Battlegroup of the Swedish Volunteer Corps.
Back in Sweden he eventually became Chief of Army Staff and the General Staff Corps (1948–53) and commander of the I Military Area (1953–61) before retiring as a Lieutenant General in 1961.