Poltergeist, Steel roller coaster in Six Flags Fiesta Texas, San Antonio, United States.

Poltergeist is a steel roller coaster in the Rockville section of Six Flags Fiesta Texas in San Antonio. Riders are launched from a narrow tunnel into a compact "spaghetti bowl" of track containing a cobra roll, a sidewinder and a corkscrew, then spiral down and left through further twists before the final brake run. Its track was repainted light green and its supports dark green-gray in 2021.

Poltergeist opened on May 28, 1999, part of a $30 million expansion at Six Flags Fiesta Texas that also added Boomerang and Scream. It replaced Seaside Golf, a miniature golf course open since the park's 1992 debut. Werner Stengel designed it and Premier Rides manufactured it, with track fabricated by Dynamic Structures and Intermountain Lift. A 2021 refurbishment repainted the track light green and the supports dark green-gray, and it reopened on September 3, 2021.

Poltergeist sits in the Rockville section of Six Flags Fiesta Texas, and its name and ghostly statue above the station tie it to the park's supernatural theme. The 2021 refurbishment added a hedge maze, garage scenery and an archway to the queue, so riders pass themed structures before boarding.

The coaster uses linear induction motors for launching instead of traditional chain lifts, enabling rapid acceleration. An air-conditioned queue line provides shelter during wait times, particularly helpful in hot weather.

Poltergeist is one of five Premier Rides LIM Catapult coasters sharing the same layout and technical specifications, alongside the two Flight of Fear rides, The Joker's Jinx and Mad Cobra. Unlike the Flight of Fear coasters, it has no mid-course brake run. Its trains have six cars seating four riders each.