Baye (French pronunciation: [bɛj]; Breton: Bei) is a commune in the Finistère department and administrative region of Brittany in north-western France.

In French the inhabitants of Baye are known as Bayois.

Baye is located in the southeast of Finistère, 4 km (2.5 mi) west of Quimperlé, 21.5 km (13.4 mi) northwest of Lorient and 40 km (25 mi) east of Quimper.

Historically, Baye belongs to Cornouaille.

This Finistère geographical article is a stub.