The district was created in 1973, when the district Waiblingen was merged with most of the district Backnang and few municipalities from the district Schwäbisch Gmünd.
The biggest part of the district is located in the Swabian-Franconian mountains (Schwäbisch-Fränkischer Wald). The two rivers Rems and Murr gave the district its name.
Coat of arms
The coat of arms shows a deer antler in the middle, the symbol of the former state of Württemberg. The two wavy blue lines above and below symbolize the two rivers Murr (in the north) and Rems (in the south) after which the district was named.