Alfred Walker Holinshead Needler CM OBE FRSC (1906 – 4 September 1998) was a Canadian scientist, administrator, diplomat and statesman.
Alfred Needler was instrumental in establishing research for estimating large migratory marine fish populations from small samples, as well as making contributions toward Canada's participation in the International Commission for the Northwest Atlantic Fisheries (ICNAF) and later chairing the new international convention that established the Northwest Atlantic Fisheries Organization (NAFO).
Upon graduation, Needler entered public service, joining the federal Department of Marine and Fisheries and was appointed to head the oyster farming research centre at Ellerslie, Prince Edward Island.
During his time on the west coast, Needler served as a Canadian delegate to the International North Pacific Fisheries Commission (INPFC) in the late 1950s and early 1960s.
In his retirement, Needler served as the first executive director from 1971 to 1976 of the Huntsman Marine Laboratory, a joint-venture educational research facility in St. Andrews centred on the Atlantic Biological Station and funded by universities and governments.