Almopia (Greek: Αλμωπία, Local Slavic: Меглен, Моглен, Мъглен, Turkish: Karadjova) is a municipality and a former province (επαρχία) of the Pella regional unit in Macedonia, Greece. The seat of the municipality is the town Aridaia. One of the regions of ancient Macedon, north-west of Bottiaea, it corresponds roughly to the Moglena region of medieval and modern times. Ancient towns of Almopia were Horma, Apsalos and Europos.Almops the giant was considered the eponym of the region and the tribe Almopes, that were expelled by the Macedonians during the reign of Alexander I. Until the Greco-Turkish War (1919–1922) and the population exchange between Greece and Turkey in 1924, Pomaks inhabited a large part of the regions of Moglena.

The municipality Almopia was formed at the 2011 local government reform by the merger of the following 2 former municipalities, that became municipal units:

The mayor is Dimitris Pasois

The province of Almopia (Greek: Επαρχία Αλμωπίας) was one of the three provinces of Pella Prefecture. It was abolished in 2006.