Thy (Danish pronunciation: [ˈtʰyˀ], local dialect [ˈtʰyi̯kʲʰ]) is a traditional district in northwestern Jutland, Denmark. It is situated north of the Limfjord, facing the North Sea and Skagerrak, and has a population of around 44,000. The capital is Thisted. Snedsted, Hanstholm and Hurup are minor towns in the area.
Since the Danish municipal reform of 1 January 2007, Thy is roughly identical with Thisted Municipality which belongs to the North Denmark Region. The southernmost part of Thy, the Thyholm Peninsula, belongs to Struer Municipality in the Central Denmark Region. Before the merger, Thy consisted of four municipalities: Hanstholm, Thisted, Sydthy and Thyholm.
Thy forms the western part of the North Jutlandic Island and borders Hanherred to the northeast with Vendsyssel even further northeast. In the Limfjord is the island of Mors, considered a twin district of Thy, and south of the fjord is Hardsyssel in western mainland Jutland. Thy is traditionally regarded part of northern and western Jutland alike. The dialect belongs to the West Jutlandic group.