Uelzen (German pronunciation: [ˈʏltsən]) is a district (Landkreis) in Lower Saxony, Germany. It is bounded by (from the south and clockwise) the districts of Gifhorn, Celle, Heidekreis, Lüneburg and Lüchow-Dannenberg, and by the state of Saxony-Anhalt (district of Altmarkkreis Salzwedel).