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Welcome to St Mary’s Christian Brothers' Grammar School, Belfast

Latest News & Events

8th September 2023

Parent, Teacher

SIMS Parent App Year 8

SIMs Parent App for Parents of Year 8 SIMs Parent App is our main channel for communication with parents. Click[…]

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6th September 2023

School Notices


We are very excited to announce that huge progress has been made in the accumulation and digitalisation of a library[…]

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28th September 2023

Extra Curricular

Ulster Schools Golf Championship

St. Mary’s came 2nd in the Ulster Schools Golf championship on Tuesday at Spa Golf Club Ballynahinch. The three man team[…]

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26th September 2023


Free School Meals and Uniform Allowance

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22nd September 2023


Double Award Science Revision Day

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22nd September 2023


Alumni Awards 2023

St Mary’s Alumni recently presented four £1000 bursaries to the top performing A Level students in their subjects. During the[…]

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Careers news

30th June 2022
Careers Exploration Week 2022

We held the first ever St Mary’s Careers Exploration Week for Years 8 to 11 pupils from 21st to 27th[…]

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24th March 2022
Easter Creative Technology Camps

Tech Connects – FREE Digital Arts Camps – Easter 2022 Tech Connects, a two year Belfast based project aimed at providing[…]

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9th February 2022
Bring I.T. On – Virtual Careers Fair

Bring I.T. On are holding a virtual careers fair on Thursday 17th February between 2:30pm and 4:30pm. This should be[…]

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8th February 2022
Apprenticeship Week 2022

It’s Apprenticeship Week! All this week, employers, FE colleges, private training employers and universities are offering a range of virtual[…]

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Principal's Welcome

On behalf of our school community, I want to welcome you to the St. Mary’s Christian Brothers’ Grammar School website. I hope you enjoy reading about our school and finding out about the exciting opportunities we provide for all of our students.

St. Mary’s CBGS is an all-boys Voluntary Grammar School located on the Glen Road in West Belfast. The school was founded by the Christian Brothers’ in 1866 and moved to our current site in 1968. The school is inspired by the vision of Edmund Rice who wanted to create schools that provide excellent education and cultivate Gospel-based values. St. Mary’s continues this work today with over 1,170 students aged 11-19.

Our teachers recognise the uniqueness of every student, encourage firm friendships among the boys and foster a sense of community. It is within this caring and supportive environment that our students are allowed to develop their unique talents and become enthusiastic and highly motivated learners.

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