The Rural Municipality of Alexander is situated in eastern Manitoba, and is located on the southwest basin of Lake Winnipeg, the largest lake in Manitoba. The municipality is approximately 100 kilometres north east of Winnipeg, and can be accessed from the south by Provincial Trunk Highway(PTH) 59, PTH 12, or from the east by Provincial Road 317.
 
Great Falls, St. Georges and Stead are the municipality's largest communities with Lester Beach, Hillside Beach, Traverse Bay and Belair being other significant communities. Alexander boasts having some of the world's greatest beaches along Lake Winnipeg.
 
Albert Beach and Hillside Beach are just two of the largest beaches along its western boundaries.
 
The municipality ranges from the rugged characteristics of the Winnipeg River corridor to agricultural lands in the south to pristine beaches in the west.