Lumsden Beach is a resort village located in the Canadian province of Saskatchewan, within Census Division No. 6. It sits on the shores of Last Mountain Lake, in the Rural Municipality of Lumsden No. 189.
As a resort village, Lumsden Beach is one of several small lakeside communities found along Last Mountain Lake. Its setting within the Rural Municipality of Lumsden No. 189 places it among the lake-facing communities of this part of Saskatchewan.