Yumuktepe (or Yümüktepe) is a tumulus at 36°48′5″N 34°36′14″E / 36.80139°N 34.60389°E / 36.80139; 34.60389 within the city borders of Mersin, Turkey. In 1936, the tumulus was at the outskirts of Mersin. But after the rapid increase of population, now the tumulus is in the Toroslar municipality of Mersin.

Excavations during 1936-1938 period by British archaeologist John Garstang (1876–1956) who is the founder of British Institute at Ankara, have revealed a neolithic settlement which continued up to medieval ages. However, the excavations halted during the World War II and some documents in the Liverpool University have been lost after an air raid. After the war, John Garstang as well as Veli Sevin of İstanbul University and Isabella Caneva of Sapienza University of Rome continued the excavations.

There are 23 levels of occupation dating from ca 6300 BC. In his book named Prehistoric Mersin Garstang lists the tools unearthed in the excavations . The earliest tools are made of either stone or ceramic. Both agriculture and animal husbandry (sheep, cattle goats and porke) were among the economic activities in Yumuktepe. In the layer which corresponds to roughly 4500 BC, one of the earliest fortifications in human history exists. According to Isabella Caneva, during chalcolithic age an early copper blast furnace was in use in Yumuktepe. Probably Yumuktepe was a coastal settlement. But because of the alluvion carried by the nearby river Müftü, now the tumulus is 2.5 kilometres (1.6 mi) north of the Mediterranean sea side.