Gemini is a racing roller coaster with a wooden structure and steel track located at Cedar Point in Sandusky, Ohio, United States.

Built in 1978 by Arrow Dynamics and designed by Ron Toomer, it is one of the oldest roller coasters still operating at the park, with only Blue Streak, Cedar Creek Mine Ride, and Corkscrew being older.

The ride is considered a steel-tracked hybrid due to the track's use of tubular steel which sits on a wooden support structure.

Cedar Point claimed Gemini was the tallest, fastest, and steepest roller coaster in the world during its marketing campaign.

[6] Screamin' Eagle at Six Flags St. Louis opened two years earlier in 1976 and was marketed with a faster top speed of 62 mph (100 km/h), although its height and drop are smaller than Gemini.