Uder () is a municipality in the district of Eichsfeld in Thuringia, Germany. On 1 January 2024, the former municipality Uder was merged with the former municipalities Birkenfelde, Eichstruth, Lenterode, Lutter, Mackenrode, Röhrig, Schönhagen, Steinheuterode, Thalwenden and Wüstheuterode to form the current municipality Uder.