Paul Hartwig Jr. (born February 26, 1991) is an American retired professional stock car racing driver who competed in the now defunct NASCAR Whelen Southern Modified Tour for two races in 2015, getting a best finish of thirteenth at South Boston Speedway. He is the father of Paulie Hartwig III, who currently competes in the SMART Modified Tour.
Hartwig Jr. has previously competed in series such as the SMART Modified Tour, the Race of Champions Asphalt Modified Tour, the 602 Modified Tour, the Carolina Crate Modified Series, and the World Series of Asphalt Stock Car Racing.