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Llandyrnog is a large village and community in Denbighshire, Wales lying in the valley of the River Clwyd, about 3 miles (4.8 km) from Denbigh and 5 miles (8.0 km) from Ruthin. The village has good road links to Denbigh and the main A541 road at Bodfari, and is served by buses number 76 and 53. The village contains the Church of St. Tyrnog's is a Grade II* listed building, and has a notable creamery on the outskirts and former hospital.
The Church of St. Tyrnog's, a small Welsh-language chapel, is a Grade II* listed building in the village. The church was first mentioned in 1254, though the current building dates to the late 15th century. The church was extensively studied by Glynne in 1847 and Lloyd-Williams and Underwood in 1872 before being renovated in 1876-8 by W E Nesfield.
The area is home to the Kinmel Arms, The White Horse  and the Golden Lion public houses. The Golden Lion is home to the Glasgow Rangers Supporters' Club, Llandyrnog North Wales RSC, which was established in 2008. In the heart of the village there is a small butchers' shop and a general store which includes a Post Office. Llandyrnog also has a small primary school, Ysgol Bryn Clwyd, which teaches through the medium of English. 1 mile (1.6 km) away at Llangwyfan is what was Colwyn Bay/Abergele Sanatorium. It became Abergele Chest Hospital in 1955 and went on to become centre for ophthalmology in April 2012.
The main employer is the ACC Llandyrnog Creamery on the outskirts of the village, which mostly produces hard pressed and cheddar cheese. The creamery's chief investor since 2014 has been Arla Foods.
- William Roberts: according to local tradition he was born at Plas Bennett, in the parish of Llandyrnog, Denbighshire, and belonged to the Roberts family that long resided there. He died at the rectory of Llandyrnog, and was buried in the chancel of that church.
- Hafina Clwyd, journalist; raised on a farm at Llandyrnog.
- Gwen ferch Ellis: The earliest person convicted and executed for witchcraft in Wales.
- "Community population 2011". Retrieved 24 May 2015.
- Gardens of England and Wales Open for Charity. National Gardens Scheme Trust. 2002. p. 432. ISBN 978-0-900558-35-1.
- "Church of St Tyrnog, Llandyrnog". British Listed Buildings. Retrieved 25 April 2016.
- Kinnel Arms, Kinmelarms.com, retrieved 25 April 2016
- The Restaurant, Whitehorserestaurant.co.uk, retrieved 25 April 2016
- "Golden Lion". Perfectpint.co.uk. Archived from the original on 7 May 2016. Retrieved 25 April 2016.
- North Wales Loyal RSC, Northwalesloyalrsc.co.uk, retrieved 25 April 2016
- "Ysgol Bryn Clwyd". Denbighshire County Council. Retrieved 25 April 2016.
- "Abergele Hospital". National Health Service of Wales. Retrieved 24 February 2019.
- "Future of Llandyrnog Creamery secured with major investment". Daily Post. 12 March 2014. Retrieved 25 April 2016.
- "Ward population 2011". Retrieved 24 May 2015.
- Stephen, Sir Leslie (1896). DNB. Smith, Elder, & Company. pp. 394–5.
- "Tributes paid to Hafina Clwyd". WalesOnline. 21 March 2011. Retrieved 25 April 2016.
- "Gwen ferch Ellis". Church in Wales. Retrieved 4 October 2016.
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