Nordhausen I is an electoral constituency (German: Wahlkreis) represented in the Landtag of Thuringia. It elects one member via first-past-the-post voting. Under the current constituency numbering system, it is designated as constituency 3. It comprises the entirety of the district of Nordhausen with the exception of the city of Nordhausen, which compromises the constituency of Nordhausen II.[1]
Nordhausen I was created in 1990 for the first state election. Since 2019, it has been represented by Birgit Keller of The Left.