Rhein-Neckar was created in 1949, then known as
Sinsheim. In the 1965 through 1976 elections, it was named
Heidelberg-Land – Sinsheim. It acquired its current name in the 1980 election. In the 1949 election, it was
Württemberg-Baden Landesbezirk Baden constituency 7 in the number system. In the 1953 through 1961 elections, it was number 181. In the 1965 through 1976 elections, it was number 184. In the 1980 through 1998 elections, it was number 182. In the 2002 and 2005 elections, it was number 278. Since the 2009 election, it has been number 277. Originally, the constituency comprised the district of Mosbach as well as the Sinsheim district excluding the municipalities of Kürnbach, Mühlbach, Sulzfeld, and Zaisenhausen. In the 1965 through 1976 elections, it comprised the district of Sinsheim as well as the Landkreis Heidelberg district excluding the municipality of Eppelheim. It acquired its current borders in the 1980 election. ==Members==