Scaër (French pronunciation: [skɛʁ]; Breton: Skaer) is a commune in the Finistère department of Brittany in north-western France.

This represents a 33% decrease in total population since the peak census figure.

Scaër, encompassing 11,758 hectares, is the most spread-out city in Finistère and the third in Brittany.

Scaër is border by Guiscriff to the east, by Leuhan and Roudouallec to the north, by Tourc'h to the west and by Rosporden and Bannalec to the south.

The municipality launched a linguistic plan concerning the Breton language through Ya d'ar brezhoneg on 20 March 2007.