Kilkis is a city located in the Central Macedonia region of Greece. This city is also the center of the Kilkis province of the same name.

The city takes its name from the mother of Alexander the Great, the great king of Macedonia, and the father of Queen Olympias, the wife of King Philip. Kilkis is considered an important industrial centre. Metalworking, textile, food production and other industries are found in this city. The city is also important in terms of logistics and transportation. Kilkis is also a historically and culturally interesting city. The city has ancient ruins, churches, museums and other historical buildings. It also contains natural beauty and the surrounding countryside is ideal for nature walks and outdoor activities.