Jena 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 37. It covers the western part of Jena.[1]
Jena I was created for the 1994 state election. Since 2024, it has been represented by Jens Thomas of The Left.