None Is Too Many: Canada and The Jews of Europe 1933-1948

None is Too Many: Canada and the Jews of Europe 1933-1948 is a book co-authored by the Canadian historians Irving Abella and Harold Troper and published in 1983.

First published in 1983 by Lester & Orpen Dennys, the book documents the history of the Canadian response to Jewish refugees from 1933, with the rise of the Nazi government in Germany, and 1948. The authors argue that, while many nations were complicit in the Holocaust for their refusal to admit Jewish refugees during the Nazi era, the Canadian government did less than other Western countries to help Jewish refugees between 1933 and 1948. According to official statistics, 5,000 Jewish refugees entered Canada during this period, the lowest record of any Western country.

The authors identify Frederick Blair, the head of immigration in William Lyon Mackenzie King's government, as a top official who opposed and limited Jewish immigration. They say that Blair's policy had the full support of Mackenzie King, who was prime minister 1935–48; Vincent Massey, the high commissioner to Britain; and both Anglophone and Francophone elites in general.

The title is based on an anecdote recounted in the book. Early in 1945 an unidentified immigration agent was asked how many Jews would be allowed in Canada after the war. He replied "None is too many".