Tenby (Welsh: Dinbych-y-Pysgod, "little town of the fishes or little fortress of the fish") is a walled seaside town in Pembrokeshire, West Wales, lying on Carmarthen Bay, and is a popular seaside holiday resort. Attractions in Tenby include four kilometres of sandy beaches, the 13th-century town walls including the Five Arches barbican gate, the 15th-century St. Mary's Church, the Tudor Merchant's House (National Trust), a museum with art gallery, and the Pembrokeshire Coast Path, part of Britain's only coastal National Park. Boats sail from Tenby's harbour to the monastic Caldey Island while St Catherine's Island just offshore is linked to the town at low tide.

Tenby is an exceptionally busy resort in the Summer, with tourists coming from all over Britain and beyond. Its relatively unspoilt beaches and historic town walls make it a unique seaside resort. Most shops, pubs and restaurants in Tenby are specifically marketed to tourists with a number of places being standing room only in the Summer. There is a large holiday park nearby, Kiln Park and numerous hotels and guest houses.