Statistics Canada has not recently published a population for Millarville.
However, Industry Canada shows that Millarville's greater rural area had a total population of 1,949 living in 819 dwellings in 2001. With a land area of 365.8 km2 (141.2 sq mi), its greater rural area has a population density of 6.0 /km2 (16 /sq mi).
Millarville is home to the Priddis and Millarville Fair. Founded in 1907, the fair is hosted by the Millarville Racing and Agricultural Society (MRAS).