Donald ("Don" or "Donnie") Gay (born September 18, 1953) is an American former professional rodeo cowboy who specialized in bull riding. He won eight Professional Rodeo Cowboys Association (PRCA) bull riding world championships; a record as of 2024. His father, Neal Gay, was a well-known rodeo competitor and later rodeo producer and stock contractor. Don was inducted into the ProRodeo Hall of Fame in 1979; Neal was inducted in 1993, becoming the only father and son to receive that honor. In 2015, Don was inducted into the Bull Riding Hall of Fame.

Since 2000, Don has been the general manager of Frontier Rodeo Company, providing livestock to professional rodeos and bull riding events across the United States. Don also does television commentating for pro rodeo and pro bull riding events throughout the country. From the 1980s to 2000s, he was a commentator for the Mesquite Championship Rodeo when the weekly event was televised. He commentated for Professional Bull Riders (PBR) big-league events on TNN from 1993-2001, Championship Bull Riding (CBR) big-league events on Great American Country from 2009-10, and PRCA Xtreme Bulls big-league events on ESPN from 2003 to 2010 and GAC from 2011 to 2013. From 2003 to 2017 and again since 2020, Don has provided commentary for the bull riding during the live telecasts of the National Finals Rodeo each December.