Petar Ivanov Stefanov (Петър Иванов Стефанов, born ) is a Bulgarian male former weightlifter, who competed in the first heavyweight class and represented Bulgaria at international competitions. He won the gold medal at the 1989 World Weightlifting Championships in the 100 kg category. He participated at the 1992 Summer Olympics in the 100 kg event. He won the gold medal at the 1989 European Championships in the Sub-Heavyweight class (415.0 kg) and the bronze medal at the 1991 European Championships in the Sub-Heavyweight class (372.5 kg).