Cecilia "Cissi" Elwin Frenkel (; born 1 June 1965) is a Swedish journalist, television presenter and executive.
She was early on a journalist for SVT and Expressen and, along with Martin Timell, the first presenter of the SVT youth show Bullen. Between 2000 and 2006, she was the editor-in-chief for Icakuriren and in 2006 she became the publication chief for the media corporation .
In 2003, she was the host for an episode of the Sveriges Radio show Sommar i P1.
On 25 March 2006, she became the CEO of Svenska filminstitutet, a post she held until 2010.
Frenkel is in a relationship with the director Tomas Alfredson and the couple have two children together.