University of Illinois Urbana‑Champaign

Geographic Region: Census Tracts

Census tracts generally have a population between 1,200 and 8,000 people, with an optimum population of 4,000.
A census tract usually covers a contiguous area; however, the size of census tracts varies widely depending on population density. Census tract boundaries are drawn with the intention of being maintained over a long time so that statistical comparisons can be made from census to census.

Source of definition: U.S. Census Bureau, Geography Division

Illinois Census Tracts

IECAM does not present data by census tracts on the Data Hub. However, IECAM sometimes uses census tract data to make maps/charts or estimates for special purposes.