In March 1998, the Census Bureau began working with local participants to delineate their statistical areas according to the criteria provided. In the PDF below you can review the Census 2000 boundary criteria that were used to define census tracts, census block groups (BGs), census county divisions (CCDs), and census designated places (CDPs) for the Census 2000 Participant Statistical Areas Program. A formal and more detailed description of these criteria were published in the Federal Register Notice. For more information, please refer to the appropriate Federal Register citation listed at the end of each section of the PDF.
Census 2000 PSAP Criteria [PDF]
For more information about the Census Bureau's statistical areas, geographic concepts or terminology, please reference the Geographic Areas Reference Manual, published by the U.S. Census Bureau.