Proastio (Greek: Προάστιο, South Slavic: Дурутово, Durutovo or Дорутово, Dorutovo) is a village located 4 km southeast of Ptolemaida, in Kozani regional unit, within the Greek region of Macedonia.

It is situated at an altitude of 641 meters.

At the 2021 census, the population was 349.

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