Rachael Kathleen Parker (December 16, 1983 - October 1, 2017)  was an American records technician who was one of the victims in the Mandalay Bay Resort Mass Shooting that took the lives of 58 people. 
On the evening of October 1, 2017, Rachael was killed during a performance of Jason Aldean who was the last act of the Route 91 Harvest Country Music Festival. She was transferred to a nearby hospital where she was pronounced dead. She was one of 58 people who lost their lives in the Mandalay Bay Resort Shooting perpetrated by Stephen Paddock. 
Her identity was later confirmed online by Manhattan Beach Police.