Census

Our definition of Census: 

Although a sample is a subset of a group, a census is defined as an accounting of the complete population.

The United States Census Bureau serves as the leading source of quality data about the nation's people and economy and has indentified and recognizes four separate census regions (West, Midwest, South, and Northeast) and 9 census divisions (Pacific, Mountain, West North Central, East North Central, West South Central, East South Central, South Atlantic, Middle Atlantic, and New England).

These separate regions are groupings of states and subdivide the United States for the presentation and segmentation of census data.