Ioannina () is one of the regional units of Greece, located in the northwestern part of the country.
It is part of the region of Epirus. Its capital is the city of Ioannina. It is the largest regional unit in Epirus, and one of the largest regional units of Greece, with a population of 160,773 people, according to the 2021 census.
- Dodoni (3)
- Ioannina (1)
- Konitsa (6)
- Metsovo (7)
- North Tzoumerka (Voreia Tzoumerka, 2)
- Pogoni (8)
- Zagori (5)
- Zitsa (4)
Prefecture
Ioannina was established as a prefecture in 1915 (). As a part of the 2011 Kallikratis government reform, the regional unit Ioannina was created out of the former prefecture Ioannina. The prefecture had the same territory as the present regional unit. At the same time, the municipalities were reorganised, according to the table below.