Brandenburg an der Havel I/Potsdam-Mittelmark 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 16. It is located in across the city of Brandenburg an der Havel and Potsdam-Mittelmark district^[2]

The constituency includes the districts of Görden and Plaue of Brandenburg an der Havel, as well as the Potsdam-Mittelmark communities of Groß Kreutz and Kloster Lehnin, and the administrative divisions of Beetzsee, Brück, Wusterwitz, and Ziesar.

There were 52,468 eligible voters in 2024.^[1]

• Politics of Brandenburg
• Landtag of Brandenburg