Although the breeding range of the Northern Saw-whet Owl (Aegolius acadicus) is restricted to North America, the northern limits of its range are still unclear. In Quebec, the most northerly confirmed breeding records had come from the Saguenay area (Chicoutimi; 48° 25′ N, 71° 03′ W) in balsam fir- (Abies balsamea) white birch (Betula papyrifera) forest and on the Gaspé Peninsula (Amqui; 48°  28′ N, 67° 25′ W) in balsam fir-yellow birch (B. alleghaniensis) forest. Between 1998 and 2003, however, we documented nine Northern Saw-whet Owl nests in balsam fir-black spruce (Picea marina) forest in boreal Quebec on the Mingan Terraces. These records extend the species' known breeding range northward to >50° N.