Saint-Thégonnec (French pronunciation: [sɛ̃ teɡɔnɛk]; Breton: Sant-Tegoneg) is a former commune in the Finistère department in Brittany in northwestern France.

[2] The village is noted for its very elaborate parish close, one of a number in the area, which include Guimiliau and Lampaul-Guimiliau.

The municipality launched a linguistic plan through Ya d'ar brezhoneg on 25 March 2005.

As at nearby Lampaul-Guimiliau, there is a separate charnel house or ossuary, with a life-sized tableau of the Entombment of Christ.

The interior of the church is exemplary of the local version of Baroque style, with a large quantity of polychrome sculpture and decoration, including a spectacular pulpit.