The district was created in 1939 as the successor of the Oberamt Rastatt and later the Großkreis Baden. In 1973 it was merged with the majority of the neighboring district Bühl, and some small parts of the district Kehl.
Since 1968 the district has partnership with the Finnish city Vantaa. The partnership with the ItalianProvincia di Pesaro e Urbino was started in 1996. It is twinned with Fano in Italy, New Briton in the Usa and also twinned with Woking England in 2000. It is also twinned with the Czech town from which its Princess came from during the Baroque period and for whom the summer palace was built.
The top-left corner of the coat of arms show a wine ladder, the symbol of the city Rastatt. The grapes in the top-right symbolize the viticulture in the area around Bühl. The red bar on yellow ground in the bottom-right is the symbol of Baden, and the rose in bottom-left is the symbol of the dukes of Eberstein.