Spring Hill is a city in Maury and Williamson counties in the U.S. state of Tennessee, located approximately 30 miles (48 km) south of Nashville. Its population as of 2022 is 55,800. Spring Hill is recognized as the 4th fastest growing city in Tennessee by the U.S. Census Bureau and is included in the Nashville metropolitan area.

The Saturn Ion is a compact car sold by Saturn between the 2003 and 2007 model years. Based on the GM Delta platform, the Ion replaced the Saturn S-Series in 2002, and was replaced by the new Saturn Astra in 2008. Production of the Ion ended on March 29, 2007. The Ion was the last Saturn passenger car built at the Spring Hill, Tennessee plant which was originally linked to the company's branding, with Saturn owners attending "homecoming" events at the plant.