Monarch, Alberta  Monarch is a hamlet in southern Alberta, Canada within the Lethbridge County. It is located on Highway 3A, approximately northwest of Lethbridge. It was formerly a village, existing as such from about 1913 to about 1938. As a designated place in the 2016 Census of Population conducted by Statistics Canada, Monarch recorded a population of 227 living in 90 of its 98 total private dwellings, a change of from its 2011 population of 220. With a land area of , it had a population density of in 2016. As a designated place in the 2011 Census, Monarch had a population of 220 living in 90 of its 90 total dwellings, an 18.9% change from its 2006 population of 185. With a land area of , it had a population density of in 2011.