As a part of the 2011 Kallikratis government reform, the regional unit Imathia was created out of the former Imathia prefecture (Greek: Νομός Ημαθίας). The prefecture had the same territory as the present regional unit. At the same time, the municipalities were reorganised, according to the table below.[2]
Note: Provinces no longer hold any legal status in Greece since 2006.
Geography
The northeastern part of Imathia, along the lower course of the river Aliakmonas, is a vast agricultural plain known as Kampania or Roumlouki. The area is known for the production of fruit crops, such as peaches and strawberries. Much of the population lives in this plain, where the towns Alexandreia and Veroia are situated. Imathia has a short shoreline on the Thermaic Gulf, around the mouth of the Aliakmonas. The mountainous western part of Imathia is covered by the Vermio Mountains, reaching 2,052 metres near the city of Naousa. The Pierian Mountains reach into the southern part of Imathia, south of the Aliakmonas. The regional unit borders on Pieria to the south, Kozani to the west, Pella to the north and Thessaloniki to the east. Imathia has a mainly Mediterranean climate with warm, dry summers and mild, wet winters.