Capel Peniel in Tremadog, Gwynedd, Wales, is a former Calvinist Methodist chapel built in 1808–1809 and completed, to the original plans, in 1849. Among the earliest, if not the earliest, chapel in Wales built to a Neoclassical design, it was hugely influential on subsequent chapel-building throughout the country. Closed as a chapel in 2010, it suffered neglect and was placed on the Heritage at Risk Register before restoration in the 2020s. It now functions as a community hall and is a Grade I listed building.