Castleknock Community College, is an Irish secondary school located on Carpenterstown Road in Castleknock, Fingal in Ireland. Established in 1995, the school is overseen by the "Dublin and Dún Laoghaire Education and Training Board".
CCC, as it is sometimes known, is a co-educational post-primary school, with a comprehensive academic curriculum and a broad programme of extra-curricular activities.
The school also offers a range of adult education classes.
An extension completed in 2015 provided several new classrooms, a fitness suite and a gymnasium.
The primary school that feeds the most pupils is "Scoil Thomáis" in St Thomas, the Apostle parish, Laurel Lodge.
The school opened on 30 August 1995 in temporary accommodation at Hartstown Community School. An official visit by the Minister for Education, Niamh Bhreathnach, took place in December 1996. The first students sat the Leaving Certificate examination in June 2000. President McAleese visited the school in 2005.
The school's first principal was Tom O'Brien who was replaced by John Cronin in 2009 when he retired.
After many years of campaigning and protest, the school finally received previously promised funding in 2014 for a new sports hall and classrooms. Construction began in April 2014 and was completed in June 2015, with the new building opened in September 2015.
Coordinates: 53°22′19″N 6°23′26″W / 53.372004°N 6.390509°W