Barnim I is an electoral constituency (German: Wahlkreis) represented in the Landtag of Brandenburg. It elects one member via first-past-the-post voting. Under the constituency numbering system, it is designated as constituency 13. It is located in the Barnim district Geography. The constituency includes the town of Eberswalde, as well as the municipality of Schorfheide, and the administrative division of Joachimsthal, Brandenburg. There were 46,467 eligible voters in 2024.