Lyth may refer to:
People R. L. Hudson (born 1940), British mathematician Adam Lyth (born 1987), English Test cricketer David H. Lyth, researcher in particle cosmology Isabel Menzies Lyth (1917–2008), British psychoanalyst John Lyth (1821–1886), English Wesleyan Methodist preacher, author, historian and hymn writer Mary Ann Lyth (1811–1890), English missionary, translator, and teacher
Places Crosthwaite and Lyth, civil parish in the South Lakeland district of Cumbria, England Lyth Hill Countryside Site, Shropshire Lyth Valley, on the edge of the Lake District National Park in Cumbria, England