The history of the founding of Dereli is rooted in deep antiquity, when the remote valleys of the Pontic Mountains first began to be settled by tribes seeking refuge within the folds of the complex terrain. Located in the heart of what is now northern Turkey, the town owes its name to its geographical position: the word "dere" in Turkish translates to "stream" or "small river," highlighting the significance of the water arteries flowing through the settlement.
The first mentions of settlements in this area date back to ancient times when the region was within the sphere of influence of Greek colonists and local tribes. Its distance from the coast and dense forests made Dereli an ideal location for agriculture and livestock farming, hidden from maritime raids. Over the centuries, the territory came under the control of the Roman, Byzantine, and finally, the Trebizond empires, while maintaining its distinct culture.
The economic rise of the settlement began thanks to the trade paths running along the bed of the Aksu River. These routes connected the port of Giresun with the inner plateaus of Anatolia. Dereli developed as a strategic point where merchants could find rest and change horses before the difficult ascent into the mountains. This combination of a favorable riverside location and proximity to alpine pastures predetermined the town's development as a center of trade between mountain dwellers and coastal residents.