Odorgonno Senior High School

Odorgonno Senior High School (Great OSSA) is a Ghanaian based senior secondary school. Its motto is Nobis Nitendum est, which is Latin and means Ours is to Strive. As of 2017, it has 2,671 students and 183 staff, including 53 non-teaching staff. On July 1, 2023, the school's academic prowess was showcased as it emerged victorious in the National Science and Maths Quiz (NSMQ) regional qualifiers, alongside other esteemed institutions like Ashaiman SHS, Labone SHS, and Achimota School. The Former Chief Justice of Odorgonno Senior High School was Master Humphrey Nyarko. He served as the CJ from November 2024- August 2025. The former Senior Boys Prefect was Master Samuel Yeku. He served as the SP from August 2024-August 2025. The Girls Prefects were Miss Esther Fosu and Miss Chantelle Duah. The former sports prefect was Kelvin Nyameyie Asante