Garrett Smithley (born April 27, 1992) is an American professional stock car racing driver. He currently competes full-time in the NASCAR Xfinity Series, driving the No. 0 Chevrolet Camaro for JD Motorsports and the No. 40 Toyota Camry for MBM Motorsports. Smithley has also competed in the Camping World Truck Series and ARCA Racing Series.
Previously, Smithley has raced in NASCAR events in cars labelled with numbers besides 0 or 40. 