Inzinzac-Lochrist () is a commune in the Morbihan department of Brittany in north-western France.
Inhabitants of Inzinzac-Lochrist are called in French Inzinzacois or Lochristois.
The town has several urban centres : Inzinzac, Lochrist, Penquesten. The river Blavet forms a natural boundary to the east and to the south. The village of Inzinzac is located northeast of Lorient. Historically, Inzinzac-Lochrist belongs to Vannetais.