Lieutenant Commander Estelle Granger was an Earth Starfleet officer during the Earth-Romulan War.

In 2156, Granger served as the first officer of the Challenger. During the Battle of Andoria, Granger advised Captain Dunsel to engage captured Yravas-class fighters. Later during the battle, Granger concurred with Dunsel's decision to activate the Challenger's self-destruct mechanism, killing her and all other hands on board. (ENT novel: Beneath the Raptor's Wing)