Margaretha Sigfridsson (born January 28, 1976 in Harjedalen) is a Swedish curler from Sundsvall. She currently skips the Swedish national team while throwing lead rocks. Sigfridsson skipped the Swedish team at the 1997 World Junior Curling Championships, winning the silver medal. Sweden lost in the final game 11–3 to Scotland, skipped by Julia Ewart. Sigfridsson was the Swedish skip at the 2002 Ford World Women's Curling Championship. Once again, she won a silver medal, and once again lost to Scotland (this time, skipped by Jackie Lockhart) in the final. The score was 6–5.