Alwyn Gwilyn Sheppard Fidler CBE (8 May 1909–1990) was a Welsh architect and town planner who was chief architect for the new town of Crawley from 1947 to 1952 and city architect of Birmingham from 1952 to 1964.
Fidler was born in Holywell, Flintshire. He was appointed a Commander of the Order of the British Empire (CBE) in 1963. He is responsible for a number of designs such as Chamberlain Gardens, part of Lee Bank and other minor projects such as Yardley Wood Fire Station in Birmingham.