A list of events that occurred on May 27 related to Six Flags.

• 1975 – Danny Teeson is born.
• 2004 – Half Pipe opens at Six Flags Elitch Gardens.
• 2010 – Little Dipper opens at Six Flags Great America.
• 2011 – SkyScreamer opens at Six Flags Discovery Kingdom.
• 2012 – SkyScreamer opens at Six Flags Fiesta Texas.
• 2017 – The Joker opens at Six Flags Great America and Six Flags New England.