| Ysgol Uwchradd Glan Clwyd | |
| Logo Alt: | Ysgol Glan Clwyd coat of arms |
| Motto: | Harddwch, Dysg, Doethineb |
| Motto Translation: | Beauty, Learning, Wisdom |
| Address: | Upper Denbigh Rd |
| Postcode: | LL17 0RP |
| Country: | Wales |
| Other Name: | YGC |
| Urn: | 401693 |
| Headteacher: | Sian Alwen |
| Gender: | Mixed |
| Age Range: | 11–18 |
| Enrolment: | 1046 (2023) |
| Colours: | Navy, blue and yellow |
Ysgol Glan Clwyd (or Ysgol Uwchradd Glan Clwyd) is a Welsh medium secondary school, and was the first of its kind. It opened in 1956, initially at Rhyl on the coast before moving inland to St Asaph in 1969.[1] [2] It is overseen by the Denbighshire Local Education Authority.
In 2022 it had 1034 students, of whom 108 were in the sixth form.[3] A government inspection reported that although 70% students are from homes where English is the main or only language spoken, 95% of the students spoke Welsh as well as a native speaker. All subjects are taught in Welsh apart from English and a few in the sixth form.
There is a class for non-Welsh speakers to learn Welsh. Later in school, these pupils join mainstream classes.
The school has been reconstructed and refurbished in regards to Denbighshire County Council's twenty-first century school modernisation plan. The new building and refurbishment officially opened in September 2017, but pupils were moved into the building when the school opened in January 2017.[4]
Musical theatre is important in Ysgol Glan Clwyd. The school has recently put on a musical under the name of Sioe Y Sioeau, which included songs from The Lion King and Hairspray. It also included the play Blood Brothers.
The school has also recently performed a show called "Yn y Dechreuad" or "In the Beginning" about how and why the school started and its journey to what the school is today.