The Municipality of Serres is the capital of the prefecture of Serres, which is geographically located in Northern Greece (and has the largest population in Northern Greece) and is also the second largest city of the Region of Central Macedonia. The city of Serres has high level settlement functions and is one of the most important urban centers of the country. It operates not only as a growth pole for the wider valley of Serres, but also as a cross-border cooperation center, taking advantage of its geographical position, population size and the possibility of developing administrative infrastructure and interbalkan character initiatives.The population of Serres amounts to 76,817 inhabitants with a population density of 50.6 per km². The road distance between Serres and Thessaloniki is 80 km while the road distance between Serres and the borders of Bulgaria is 35 km.