Billy Bigley, Jr. (June 9, 1962 - ) is a former NASCAR driver from Naples, Florida. He completed in 24 Craftsman Truck Series events in his career as well as being the 2000 champion of the Slim Jim All Pro Series.
All of those came in the 2001 season, when Bigley was tapped to drive the #75 Spears Motorsports Chevy. He struggled in his debut, finishing 26th at Daytona and then 24th at Homestead-Miami. But at Mesa Marin, Bigley finished 9th for his first career top-10. He would earn seven other top-tens on the year, most at places tough for a rookie: Darlington (9th), Milwaukee (7th), and Richmond (10th). The best of Bigley's finishes came at the new Kansas, when Bigley led only two laps of his career and rolled onto a 5th place effort, his only top-five. At the end of the year, Bigley had an impressive run: a 13th place in points and just 4 DNFs. However, Bigley was released in favor of David Starr and Bigley has not raced since.