Sils im Engadin /Segl (German: Sils im Engadin; Romansh ), often also as Sils i.E./Segl, is a municipality and village in the Maloja Region , Upper Engadine in the Swiss canton of the Grisons .

It consists of two villages, Segl Maria (Romansh, German: Sils Maria; Seglias is part of Segl Maria) and Segl Baselgia (German: Sils Baselgia; Baselgia is Romansh for church); the Val Fex (German: Fextal); and three Maiensässe (Alpine pastures traditionally used for spring grazing): Grevasalvas , Blaunca and Buaira, above Plaun da Lej on the left side of the valley.

The municipality's official label uses both the German and the Romansh versions of its name: Segl is the Romansh version while Sils im Engadin is the German. Engadin is Romansh for "Valley of the Inn (Romansh: En)", the river, which flows northeast from Maloja through Sils Baselgia and eventually into the Danube at Passau, Germany at the German-Austrian border.

Sils i.E is distinguished from Sils im Domleschg in another Swiss watershed. Sils was originally divided into the three hamlets of Segl Baselgia, Segl Maria, and Seglias.