Arnissa (Greek: Άρνισσα, before 1926: Όστροβον, Ostrovon;[2]) is a town in the Pella regional unit of Macedonia, Greece.

[4] At the end of the 19th century, approximately 300 families lived in the settlement, of which 200 were Christian and the rest Muslim, while the population was Slavic-speaking.

At the same time, tensions had begun between the patriarchal and Bulgarian Exarchists, with the latter occupying by force the two most important holy sites of the village.

[6] Clashes took place in the area between the Greek and Turkish armies on 3 and 4 November 1912 during the Balkan Wars.

Arnissa is known for its apple crops, while there is also a women's cooperative that produces, using traditional means, pasta, spoon sweets, pickles, paprika and compotes.