St. Joseph's College Ombaci is a boys-only boarding middle and high school located in Arua City in the Northern Region of Uganda.

The school campus is approximately 6 kilometres (4 mi), by road, northeast of the central business district of Arua, the largest city in the sub-region.

During the 1970s and 1980s, Ombaci rose to become one of the top five secondary schools in Uganda, under the leadership of its first headmaster, Father Marco Lino Mich, then later under Hercules Abiriga.

List of Headmasters: On Wednesday, 24 June 1981, six months into the second reign of Apollo Milton Obote, UNLA soldiers arrived at the Ombaci Catholic Mission and adjoining secondary school.

They began to indiscriminately kill civilians, women, children and the elderly; by shooting, bludgeoning, stabbing, lancing, stomping, kicking and exploding ordinance (rocket propelled grenades).