Osman Ahmed (Arabic: عثمان أحمد) was a Somali ruler. He was the fifth and final Sultan of the Geledi Sultanate. Osman Ahmed is considered less illustrious than his predecessors and Gobroon power weakened considerably under his rule. He was the son of Sultan Ahmed Yusuf and succeeded his father after his death. Although, considerably weaker than his forebearers he was still the most powerful ruler in the region and was credited for defending the Reewing territory by repulsing an invasion from the Ethiopian Empire and Dervish State.