Kyra Gracie Guimaraes (born May 29, 1985 in Rio de Janeiro, Brazil) (also spelled Kira) is a Brazilian Jiu-Jitsu black belt and multiple title holder. Her mother (Flavia Gracie) and her uncles (Ralph Gracie, Renzo Gracie, Ryan Gracie) all practice BJJ.

She is one of the few Gracie women to achieve a black belt in BJJ, and is the first Gracie female to actively compete in the sport. She is currently living in the United States, where she is associated with the Renzo Gracie Academy in New York, and the Gracie Barra Academy in Lake Forest, California. She is also associated with the Gracie Barra Academy in Rio de Janeiro.

* 2x World BJJ Champion (2004, 2006)
* 5x Pan American BJJ Games Champion (2001, 2002, 2003, 2005, 2007)
* 5x Brazilian BJJ Champion (1998, 1999, 2000, 2001, 2004)
* 5x New York State BJJ Champion (1998, 1999, 2000, 2001, 2002)
* 2x ADCC (Abu Dhabi Combat Club) Submission Wrestling World Champion (2005, 2007)
* 1x Asiatic BJJ Champion (2006)