Skip to Main Content

Teaching With the Census

Understanding Geographic Level Data

Metropolitan Statistical Area (MSA) -Cities and surrounding areas of 50,000 people or more

Tracts- 1,200-8,000 people with an optimum of 4,000

Block Groups - 600-3,000 people. Block groups usually have between 250 and 550 housing units. Block Groups are the smallest area for which American Community Survey (ACS) data are collected and published.

Blocks -Census blocks, the smallest geographic area for which the Bureau of the Census collects and tabulates decennial census data, are formed by streets, roads, railroads, streams and other bodies of water, other visible physical and cultural features, and the legal boundaries shown on Census Bureau maps.


Jim Bondra

Profile Photo
Jim Bondra
607-220-4382 (mobile)