The Rural Municipality of Rhineland is a former rural municipality (RM) in the Canadian province of Manitoba. Since 1876, the area made up part of the Mennonite West Reserve. The R.M. of Rhineland was originally incorporated as a rural municipality on February 14, 1880 and later absorbed the neighbouring RM of Douglas in January 1891. It ceased on January 1, 2015 as a result of its provincially mandated amalgamation with the towns of Gretna and Plum Coulee to form the Municipality of Rhineland.