Llwynmawr is a village in Wrexham County, North Wales. The village is situated in the beautiful Ceiriog Valley to the west of Chirk (Y Waen), at the head of the valley, and to the south of the picturesque Llangollen, with a host of attractions including the Llangollen Canal, steam railway and Plas Newydd.

Llwynmawr is close to the magnificent marcher fortress of Chirk Castle which was completed in 1310 - the castle is the last Welsh castle from the reign of Edward I that is still lived in today.

A medieval tower and dungeon are among the attractions on offer at this 700 year old National Trust building as well as a 17th century long gallery, grand 18th century state apartments, servants' hall and also historic laundry quarters.

The B4500, which runs from Chirk to Glyn Ceiriog, passes through the village and can be used to access Offa's Dyke and also Wat's Dyke Way. Offa's Dyke Path is one of the most attractive and varied National Trails. The route passes across wide river valleys, ancient woodland and high wild moorland. Hill forts, castles, abbeys and habitation remains can be seen as well as beautiful and contrasting scenery.

The River Ceiriog rises in the Berwyn Mountains at 1,800 feet and then descends over 18 miles to the east to converge with the River Dee. The river runs through Llwynmawr and along through Chirk and provides one of the nicest walks in North Wales. It is fairly easy going, with charming views and picture-book landscapes.