As of early 2026, the fastest roller coaster in North America is Kingda Ka, located at Six Flags Great Adventure in Jackson, New Jersey. This massive "Strata" coaster uses a hydraulic launch system to catapult riders from 0 to 128 mph (206 km/h) in just 3.5 seconds. Once it hits top speed, the train climbs a vertical 456-foot tower before plunging straight back down. While new coasters are frequently announced, such as the upcoming Fast & Furious: Hollywood Drift at Universal Studios Hollywood (opening Summer 2026), Kingda Ka remains the speed king of the continent. For comparison, the second fastest is Top Thrill 2 at Cedar Point, which reaches 120 mph. If you're looking for the ultimate "G-force" adrenaline rush, the New Jersey woods remain the primary destination for speed enthusiasts on the North American theme park circuit.