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Although green tree retention has been proposed as a means of maintaining forest structural attributes normally found after stand replacing disturbances, there is some concern about mortality and fall rates of residual trees. Very little data regarding windthrow after green tree retention is currently available for Quebec, eastern Canada. The present study documents windthrow after two types of retention in two regions with contrasting biophysical characteristics, and identifies the most influential factors. A retrospective survey of windthrow was conducted in dispersed and group retention cuts conducted two to five years previously. In the Abitibi region of northwestern Quebec, the level of windthrow was comparable between group and dispersed tree retention. In the North Shore region of eastern Quebec, windthrow was higher in dispersed retention and levels of mortality were generally lower than in the Abitibi region …