Illmitz (German pronunciation: [ˈɪlmɪt͡s] ⓘ; Hungarian: Illmic) is a market town in the district of Neusiedl am See in Burgenland in Austria.

Nearby, an area 114 m (374 ft) above sea level is the lowest elevation of Austria.

In 1867, the Austrian Empire was dissolved, and Austria-Hungary was formed, with separate governments in Vienna and Budapest.

In December 2001, the National Park Neusiedler See-Seewinkel was named a UNESCO World Heritage Site.

Winemakers such as Alois Kracher, Willi Opitz and Stefan Tschida and Salzl are famous for their noble sweet wines.