Kelmis (German pronunciation: [ˈkɛlmɪs]; French: La Calamine, pronounced [la kalamin]) is a municipality located in the Belgian province of Liège, named for the historical deposits of calamine (zinc ore) nearby.

[2] The municipality comprises the following sub-municipalities: Kelmis proper, Hergenrath, and Neu-Moresnet.

The territory around the Vieille Montagne zinc mine in Kelmis was Neutral Moresnet, a neutral condominium of the Netherlands and Prussia (later Belgium and Germany) from 1816 to 1919, with the Mayor of Kelmis nominated by two commissioners from the neighbouring countries.

Although there were attempts by locals to make it evolve into a fully independent microstate, all of them were thwarted, and it remained under double sovereignty and neutrality until its eventual annexation by Belgium after the First World War.

[5] In the nineteenth century, a Low Dietsch dialect was spoken in Kelmis.