Trígono (Greek: Τρίγωνο, [ˈtriɣono], meaning "triangle") is a former municipality in the Evros regional unit, East Macedonia and Thrace, Greece.

Trigono is the country's northernmost municipal unit, situated in the triangle between the rivers Evros and Ardas.

The nearest cities are Svilengrad (Bulgaria) to the north, Edirne (Turkey) to the east, and Orestiada to the southeast.

The area consists mainly of low hills, with plains in the river valleys, and higher elevations up to 400 m towards the west.

The municipal unit Trigono is subdivided into the following communities (constituent villages in brackets):[2]