Wikipedia
Kilkis (regional unit)
Kilkis is one of the regional units of Greece. It is part of the region of Central Macedonia. Its capital is the city of Kilkis.
Kilkis
Kilkis is an industrial city in Central Macedonia, Greece. there were 22,914 people living in the city proper, 28,745 people living in the municipal unit, and 51,926 in the municipality of Kilkis. It is also the capital city of the regional unit of Kilkis.