Sharon Maria Jacoba Gerarda Gesthuizen (born 23 January 1976 in Nijmegen) is a Dutch politician and former businesswoman and trade unionist. As a member of the Socialist Party (Socialistische Partij) she has been an MP since 30 November 2006. She focuses on matters of economic affairs, asylum and immigration policy, and judiciary.
From April till December 2006 she was a member of the municipal council of Haarlem
Gesthuizen grew up in Millingen aan de Rijn and studied art at the Artez Institute of the Arts in Arnhem. From 2002 to 2003 she was a member of the Dutch National Students' Trade Union (LSVb).