Kristrún Mjöll Frostadóttir (born 12 May 1988) is an Icelandic economist and congresswoman as well as chairman for the Social Democratic Alliance. She was born in Reykjavík.Frostadóttir graduated from Boston University with a master degree in economics. She is the former main economist for the bank and a specialist for Morgan Stanley. She has worked as a journalist for the business newspaper Viðskiptablaðið. In 2021 she was elected into the parliament Alþingi for the Social Democratic Alliance and in 2022 she sought to be chairman of the same party.