Cottbus 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 43.

It is located in within the city of Cottbus.

[2] The constituency includes the districts of Branitz, Dissenchen, Döbbrick, Merzdorf, Mitte, Sandow, Saspow, Schmellwitz, Sielow, Skadow, and Willmersdorf within the city of Cottbus.