兰迪德诺（英语：Llandudno）是一个临海城镇，位于威尔斯的康威郡自治市内。维多利亚时代中期时为了设立一个度假胜地而筑成。由于偏离于1848年开设的北威威尔斯沿海铁路，遂于1858年开设支线由兰迪德诺交汇站往来兰迪德诺站。

兰迪德诺最早于1864年就被誉为威尔斯度假胜地之后（Queen of the Welsh Resorts），现已成为威尔斯最大的海边渡假地之一，坐落于威尔斯大陆与大欧姆半岛。

兰迪德诺的名称来自教区的圣人Saint Tudno，并融入周边城镇 Craig-y-Don、Llanrhos等市名演化而成的。邻近还有迪甘韦（Deganwy）的小城市。

Llandudno (/θlænˈdɪdnoʊ/ or /lænˈdɪdnoʊ/; Welsh pronunciation: [ɬanˈdɨ̞dnɔ]) is a seaside resort, town and community in Conwy County Borough, Wales, located on the Creuddyn peninsula, which protrudes into the Irish Sea. In the 2011 UK census, the community, which includes Penrhyn Bay and Penrhynside, had a population of 20,710. The town's name is derived from its patron saint, Saint Tudno.