The Gravity Group is a wooden roller coaster design firm based in Cincinnati, Ohio, United States.

The firm was founded in July 2002 out of the engineering team of the famed but now defunct Custom Coasters International.

The first coaster designed under the Gravity Group opened as Hades at Mount Olympus Theme Park in 2005.

The Gravity Group designed Ravine Flyer II at Waldameer in Erie, Pennsylvania, which was opened at the start of the 2008 season.

In 2008, members of The Gravity Group announced the development of their own wooden coaster trains called Timberliners.