Aden Abdulle Osman Daar (, ) (December 9, 1908 – June 8, 2007), popularly known as Aden Adde, was a Somali politician who served as the first president of the Somali Republic from July 1, 1960 to July 6, 1967. A leader of the Mudug Regional Council, he was the first President of the Somali Republic, a sovereign state covering present-day Somalia and Somaliland. He previously served in the Somali Youth League In 1944. In 1946, he was named Secretary of the party's section in Beledweyne, Somalia. In 1951, the Mudug Regional Council appointed him for the Regional Council, and two years later, he became Vice President of the Regional Council. In 1944, he joined the Somali Youth League. From 1954 until 1956, he was the President of the Somali Youth League. He was re-elected in May 1958, and he continued to hold this position simultaneously along with that of President of the Legislative Assembly until 1960.