Guido Antonius Gerardus Alkemade (born 23 June 1962 in Leiden) is a sailor from the Netherlands, who represented his country at the 1984 Summer Olympics in Los Angeles.

Four years later Alkemade returned as substitute, for the Dutch 470, to the 1988 Summer Olympics.

After the Olympics Alkemade and Huub Lambriex started their own company, (1984) in yacht equipment, LA84, specialized in ropes.

After the sale of the company (2006), to On Deck and Beyond, Alkemade held the following positions:

This biographical article related to sailing in the Netherlands is a stub.