Týr (/tɪər/;^[1] Old Norse: Týr, pronounced [tyːr]) is a god in Germanic mythology and member of the Æsir. In Norse mythology, which provides most of the surviving narratives about gods among the Germanic peoples, Týr sacrifices his right hand to the monstrous wolf Fenrir, who bites it off when he realizes the gods have bound him. Týr is foretold of being consumed by the similarly monstrous dog Garmr during the events of Ragnarök.

The interpretatio romana^[a] generally renders the god as Mars, the ancient Roman war god, and it is through that lens that most Latin references to the god occur. For example, the god may be referenced as Mars Thincsus (Latin 'Mars of the Assembly [Thing]') on 3rd century Latin inscription, reflecting a strong association with the Germanic thing, a legislative body among the ancient Germanic peoples. By way of the opposite process of interpretatio germanica, Tuesday is named after Týr ('Týr's day'), rather than Mars, in English and other Germanic languages.

In Old Norse sources, Týr is alternately described as the son of the jötunn Hymir (in Hymiskviða) or of the god Odin (in Skáldskaparmál). Lokasenna makes reference to an unnamed and otherwise unknown consort, perhaps also reflected in the continental Germanic record (see Zisa).

Due to the etymology of the god's name and the shadowy presence of the god in the extant Germanic corpus, some scholars propose that Týr may have once held a much more central place among the deities of early Germanic mythology.

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