Ortenaukreis (Low Alemannic: Ortenaukrais; French: Arrondissement de l'Ortenau) is a Landkreis (district) in the west of Baden-Württemberg, Germany.

Neighboring districts are (clockwise from north) Rastatt, Freudenstadt, Rottweil, Schwarzwald-Baar and Emmendingen.

Offenburg district already had a city partnership with Altenburg so, after German reunification in 1990, Ortenaukreis chose to help modernize the Altenburger Land administration to the West German standard.

France and Germany have created the Strasbourg-Ortenau eurodistrict straddling the Rhine and combining Ortenaukreis and Greater Strasbourg, with an overall population of 950,000.

In an escutcheon on the breast of the eagle is the patron Saint George, depicted killing the dragon.