In the 2021 Census of Population conducted by Statistics Canada, Killaly had a population of 58 living in 27 of its 31 total private dwellings, a change of -10.8% from its 2016 population of 65. With a land area of 2.64km2 (1.02sqmi), it had a population density of 22.0/km2 (56.9/sqmi) in 2021.[4]
In the 2016 Census of Population, the Village of Killaly recorded a population of 65 living in 28 of its 48 total private dwellings, a -13.8% change from its 2011 population of 74. With a land area of 2.59km2 (1.00sqmi), it had a population density of 25.1/km2 (65.0/sqmi) in 2016.[5]