Margot Elisabeth Wallström (ˈmaɾːɡɔt ˈvalːstɾœm) (born 28 September 1954 in Skellefteå) is a Swedish Social Democratic politician, currently serving as European Commissioner for Institutional Relations and Communication Strategy. She is also the first of five vice-presidents of the 27-member Barroso Commission.

Wallström, a high school graduate, has had a long career in politics, in the Swedish parliament, the Swedish government and in the European Commission. She was Environment Commissioner from 1999-2004 and in the Swedish government she was Minister for Consumer Affairs, Women and Youth in 1988-1991, Minister for Culture in 1994-1996 and Minister for Social Affairs in 1996-1998. Wallström has also worked as the CEO of a regional TV network in Sweden and before taking up her appointment as Commissioner she was the executive vice-president of Worldview Global Media in Colombo, Sri Lanka. Wallström is married and has two children.

In 2004, Wallström became the first member of the European Commission to operate a blog. The comments section of her site quickly became a hotspot for arguments concerning the policies of the European Union. After the rejection of the European Constitution by French and Dutch voters, Wallström pushed forward her "plan D" (for democracy, dialogue and debate) to reconnect Citizens with the Union. Her work on such platforms, including the backing of the oneseat.eu petition, has given her a good reputation in some quarters, even being dubbed "the Citizens Commissioner".