Petrovouni (, meaning "rocky mountain", before 1927: ÃÂñÃÂÃÂñòÃÂÃÂÃÂù - Vastavetsi) is a village in the municipal unit of Tzoumerka (Ioannina, Epirus), Greece. It is situated on a mountainside of the Athamanika mountains, above the left bank of the river Arachthos, at 1,030 m elevation. It is 3 km north of Chouliarades, 9 km west of Syrrako and 17 km southeast of Ioannina. Its population is 87 people (2021 census).