Köseoğlu is a Turkishword. It may refer to:
People Hakan Köseoğlu (born 1981), Turkish former professional basketball player Hayal Köseoğlu (born 1992), Turkish television, theater actress and musician Leyla Yeniay Köseoğlu (1926–2002), Turkish female politician Selâhattin Köseoğlu (1882–1949), Turkish military officer and politician Selin Köseoğlu (born 1991), Turkish actress
Places Köseoğlu, Kastamonu, a village in Kastamony Province, Turkey