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For the 1980 Census, criteria for BNAs were changed to make them more comparable in size and shape to census tracts. For the 1990 Census, all counties contained either census tracts or BNAs. Census 2000 was the first decade in which census tracts were defined in all counties. In addition, the Census Bureau increased the number of geographic ...
The 2000 United States census, conducted by the Census Bureau, determined the resident population of the United States on April 1, 2000, to be 281,421,906, an increase of 13.2 percent over the 248,709,873 people enumerated during the 1990 census. [1]
ZIP Code Tabulation Areas (ZCTAs) are statistical entities developed by the United States Census Bureau for tabulating summary statistics. These were introduced with the Census 2000 and continued with the 2010 Census and 5 year American Community Survey [1] datasets. They were updated again for the 2020 census.
National Historical Geographic Information System (NHGIS) is a system for displaying and analyzing Census tracts and tract changes in the United States. OpenHistoricalMap is an open-source historical world atlas based on OpenStreetMap technology and practices.
TIGER includes both land features such as roads, rivers, and lakes, as well as areas such as counties, census tracts, and census blocks. Some of the geographic areas represented in TIGER are political areas, including state and federally recognized tribal lands, cities, counties, congressional districts, and school districts.
This is a list of urban areas in the United States as defined by the United States Census Bureau, ordered according to their 2020 census populations. An urban area is defined by the Census Bureau as a contiguous set of census blocks that are "densely developed residential, commercial, and other nonresidential areas". [1]
Every Census Block Group has a unique 12-digit FIPS code. The Block Group's unique identifier is the 12th digit of the FIPS Code. This number determines the first digit of all the census blocks contained within a block group. For instance, census Block Group 2 includes any block numbered 2000 to 2999.
Census 2000 Block Map of DeKalb County, Georgia, showing the county's five CCDs (delineated by the dark lines). CCDs are non-governmental units and have no legal or governmental functions. Their boundaries usually follow visible features, such as roads, railroads, streams, power transmission lines, or mountain ridges, and coincide with the ...