Sandister Tei (/ˈteɪ/ TAY) is a Ghanaian media professional who was named the Wikimedian of the Year in October 2020 by Wikipedia co-founder Jimmy Wales during Wikimania 2020.

Tei is the co-founder of Wikimedia Ghana User Group, a community of Ghanaian Wikimedians which was created in 2012.

[10] She represented Wikimedia Ghana User Group in Washington DC to confer with organizers of 2012 Wikimania about ways to increase African content on Wikipedia.

[11] She was named the Wikimedian of the Year on 15 October 2020 by Wikipedia co-founder Jimmy Wales in a live YouTube and Facebook broadcast.

Because of travel restrictions, Wales could not personally deliver the award to Tei as per standard practice, but instead spoke to her in a surprise Zoom call.