Francis Andrew (Andy) Brewin (September 3 1907 - September 21 1983) was a lawyer and Canadian politician.

Brewin was a stalwart in the Cooperative Commonwealth Federation and ran numerous times federally and provincially in the 1940 and 1950s. As a lawyer in the 1940s he was retained by a committee of Japanese-Canadians who had been detained during World War II as "enemy aliens" in order to try to have their property restored. He succeeded in persuading the government to call a Royal Commission to investigate the question.

He was a candidate in the 1953 Ontario CCF leadership convention losing to Donald C. MacDonald.

Brewin was first elected to the Canadian House of Commons on behalf of the CCF's successor, the New Democratic Party of Canada. Brewin sat as Member of Parliament for the Toronto riding of Greenwood from the 1962 Canadian election until his retirement in 1979.

Andrew Brewin considered himself a Christian Socialist and wrote a number of books and pamphlets on the topic.