She said that Kerry will leave for India on Friday night and then travel to the Swiss city.
Earlier, Abbas Araqchi, senior Iranian nuclear negotiator, also said Zarif would meet with Kerry in Geneva.
The two top diplomats will travel to Geneva on January 14 to hold a meeting prior to the bilateral meeting of their deputies, Iranian Deputy Foreign Minister for Legal and International Affairs Araqchi said.
Araqchi said Iranian and American negotiating delegations will subsequently hold bilateral negotiation January 15 to 17 in Geneva and that Iran and the P5+1 group of world powers will negotiate at deputy foreign ministerial level on January 18.
Iran and the six powers – Russia, China, Britain, France, the US and Germany -- are working to reach a final accord aimed at putting an end to the longstanding dispute over Tehran’s nuclear issue.
Despite progress in the talks, two sides failed to clinch a final deal by a Nov. 24 deadline. The talks have now been extended until July 1, 2015.