Agkistro or alternatively Agistro, is a village in the Serres regional unit, Greece. The village is part of the municipality of Sintiki and hosts a population of 350, according to the 2021 census. The municipal unit has an area of 70.937 km2. Agistro lies near the Greek-Bulgarian border and 10 km from the border crossing of Promachonas. The village main tourist attraction is its steam bath complex, which dates from the Byzantine period.