Tonka Ivanova Petrova (Bulgarian: Тонка Ивановна Петрова) (born 1 February 1947, Yambol) is a Bulgarian middle-distance runner.

[1] She won a silver medal at European Indoor Championships in the 1500 metres run in Rotterdam in 1973.

In 1974, she won a gold medal at the European Indoor Championships' 1500 m run in Gothenburg[2] and a silver medal in a 4 x 392 metres relay race with Bulgaria.

She also competed in the women's 1500 metres at the 1972 Summer Olympics.

[3] This biographical article relating to Bulgarian athletics is a stub.