Sigfrid Lundberg

Ernst Sigfrid Lundberg (15 February 1895 – 19 May 1979) was a Swedish cyclist who competed at the 1920 Summer Olympics. He won a silver medal as part of the Swedish road cycling team, after finishing 22nd in the individual road race.

Lundberg was a welder by trade. He took part in 10 national championships and won at least 5 team titles.