A population centre, in Canadian census data, is a populated place, or a cluster of interrelated populated places, which meets the demographic characteristics of an urban area, having a population of at least 1,000 people and a population density of no fewer than 400 persons per square km2.
The term was first introduced in the Canada 2011 Census; prior to that, Statistics Canada used the term urban area.
In the 2011 census, Statistics Canada listed 37 population centres in the province of Nova Scotia.
References
List of population centres in Nova Scotia Wikipedia(Text) CC BY-SA