Diamond City is a hamlet in southern Alberta, Canada within the Lethbridge County. It is located on Highway 25, approximately 13 km north of Lethbridge. The community was so named on account of deposits of coal near the original town site, a resource also called "black diamond". Diamond City was first settled at the turn of the 20th century by farmers, ranchers and miners. The community grew rapidly when a coal mine was opened in 1905. Previously an incorporated town, Diamond City dissolved on June 30, 1937.

Demographics

In the 2021 Census of Population conducted by Statistics Canada, Diamond City had a population of 204 living in 64 of its 68 total private dwellings, a change of NaN% from its 2016 population of 184. With a land area of 0.51 km2, it had a population density of in 2021. As a designated place in the 2016 Census of Population conducted by Statistics Canada, Diamond City had a population of 184 living in 62 of its 64 total private dwellings, a change of NaN% from its 2011 population of 162. With a land area of 0.54 km2, it had a population density of in 2016.