Karl Sigurd Andersson (18 July 1926 – 5 February 2009) was a Swedish cross-country skier who won a bronze medal in the 4 × 10 km relay at the 1952 Winter Olympics in Oslo. Andersson was lumberjack by profession. He won his first skiing medal in 1946, at the junior district championships. In 1950 he finished third in the 15 km race at the national senior championships and was included into the national team. He won his only national title in 1952, in the relay.