Christian Brothers Grammar School, Omagh

The Christian Brothers Grammar School, Omagh is a state funded 11–18 boys grammar school in Omagh, County Tyrone, Northern Ireland. It is the largest grammar school in Omagh, and is under the trusteeship of the Edmund Rice Schools Trust (NI). On January 14, 1881, the school officially opened, with 121 boys presenting themselves for admission.

The school was founded on 14 January 1861, on Mount St. Columba by "The Brothers" who were in the town of Omagh, who established the school after being given the responsibility of ensuring that education was gratuitous and the students had free admission on entry. The school is known locally as "The Brothers, Omagh CBS" or "Scoil Ghramadaí na mBráithre Críostaí, An Omaigh", which is its native name in Irish.

The school was founded on 14 January 1861, on Mount St. Columba. "The Brothers" in Omagh were given the responsibility of ensuring that "Education be gratuitous and the admission free." On January 14, 1861, the school officially opened, with 121 boys presenting themselves for admission.

An extension was completed to the original building in 1903 as the school community continued to grow. The extension consisted of a second floor to the school and a third to the brothers' house. This came at the time at a considerable cost of £1,200, partly financed by an £800 loan from past pupils. Operations of the school were moved to old Church, Brook Street while construction was under way. Once finished the renovations provided the school with three more rooms; one for Manual Instruction, a sixty student accommodating classroom and a room with all the necessities for Practical and Experimental Science. By 1932, a new building was constructed to accommodate 125 Secondary School pupils and 6 teachers (2 Brothers), with the full site also consisting of 210 Primary School pupils and 6 teachers (5 Brothers).

The school continued to increase in numbers throughout the 1950s, with 216 Grammar School pupils and 361 Primary School pupils along with 16 staff in total by 1955. The centenary celebrations of the school were marked during January 1961, with a local housing development being named Centenary Park to commemorate the centenary of the school.

Since the construction of a new building completed in 1967, the original school building has since gone into other use as a retreat. A primary school, Holy Family Primary School - Junior Site (previously St Colmcille's Primary School), has been the school there since. Its original headmaster was Brother John Redmond. On its first day of activity one hundred and twenty boys, all aged between five and fifteen, showed up.

The school moved to is present site on Kevlin Road in 1967. The school building officially opened on Kevlin Road on 4 September 1967. In 1993, after the resignation of Brother McCrohan, the school appointed its first non-clerical headmaster, Roddy Tierney, a former pupil of the school and a teacher in the school. The Principal is Foncy McConnell who was appointed in March 2016, having been acting Principal for the previous year, and previously Vice Principal, having taught in the school since 1987.

In 2000, the school opened a new Sports Complex at Coolnagard and, in 2007, the school won the Hogan Cup, making the school All Ireland Colleges Champions in Gaelic Football. The beginning of the 21st Century saw the school maintain its high standards of academic excellence, as well as an unprecedented period of sporting excellence. Academic rewards included record breaking A-Level and GCSE results, as well as numerous pupils attaining top place in subjects at both GCSE and A-Level. In 2018, the school celebrated 50 years on the Kevlin Road site.