Similar to postal codes, all of Canada is divided into dissemination areas (DA). DA's are geographically larger than postal codes. Overall, there are approximately 54,000 DA's in Canada (versus 850,000 postal codes) and each DA consists of 400 to 700 individuals (approximately 250 households).
Dissemination areas are the smallest geographic areas used in the Canadian census. Because of this, DA's are often used by demographic firms and marketers as a basis for expanding upon census data. As for how DA's are defined, Statistics Canada divides the country into DA's by following a number of delineation criteria:
For more information on dissemination areas, please visit Statistics Canada.