Brigadier Samuel Adesujo Ademulegun (20 October 1924 – 15 January 1966) was a prominent Nigerian Army officer and the Commander of the 1st Brigade during the January 1966 coup.

Early Life and Family
Born on 20 October 1924 in Ondo Town, Western Nigeria, Brigadier Ademulegun was esteemed as one of the country's leading military officers. He was the son of Mr. and Mrs. Michael Ademulegun and received his initial education in Ondo State before enlisting in the Nigerian Army as a private in 1942. Ademulegun was married to Mrs. Latifat Feyisitan Abike Ademulegun (née Noble), known as Sisi Nurse. Tragically, he was murdered during the January 1966 coup. He left behind his daughter, Mrs. Solape Ademulegun-Agbi, and sons Bankole, Kunle, Gbenga, Goke, and his eldest son Frank Bamidele. Frank Bamidele later joined the Nigerian Air Force, rising to the rank of Group Captain before his death in 2002.

Career Life
Ademulegun was commissioned as an officer in 1949 and was part of the senior officer corps alongside notable figures such as Aguiyi Ironsi, Zakariya Maimalari, and Babafemi Ogundipe. In 1965, he was a contender for the position of General Officer Commanding (GOC) following the retirement of the expatriate GOC. His association with Ahmadu Bello, which was perceived as a sign of favoritism, led to discontent among some junior officers who resented his close ties with politicians.

Death
During the January 1966 coup, Ademulegun and his wife were murdered in their bed by rebels led by Timothy Onwuatuegwu, an instructor at the Nigerian Military Training College. An account provided by his daughter, Mrs. Solape Ademulegun-Agbi, details the harrowing circumstances of her father's death and the invasion of their home by military officers. Ademulegun's assassination marked one of the early episodes in Nigeria's series of coups, with the perpetrators aiming to eliminate corrupt politicians and their associates.