Potsdam 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 21.

It is located in within the city of Potsdam.

[2] The constituency includes the districts of Babelsberg, Klein-Glienicke, Nördliche Innenstadt, Nördliche Vorstädte, and Westliche Vorstädte There were 53,688 eligible voters in 2024.