Census block


Census block

A census block is the smallest geographic unit used by the United States Census Bureau for tabulation of 100-percent data (data collected from all houses, rather than a sample of houses). Several blocks make up block groups, which again make up census tracts. There are on average about 39 blocks per block group, but there are variations. Blocks typically have a four-digit number where the first number indicates which block group the block is in, for example Block 3019 would be in block group 3. The number of blocks in the United States including Puerto Rico is about 8,200,000.

Blocks are typically bounded by streets, roads or creeks. In cities a census block may correspond to a city block, but in rural areas where roads are fewer, blocks may be limited by other features. The population of a census block varies greatly, there are about 2,700,000 blocks with a population of 0, while a block with an apartment complex may have several hundred inhabitants.

Census blocks covering the entire country were introduced with the 1990 census. Prior to this, back to the 1940 census, only select areas were divided into blocks.

References

*U.S. Census Bureau. Information on geography and data for all blocks is provided at their [http://factfinder.census.gov/servlet/DatasetMainPageServlet?_program=DEC&_lang=en&_ts= Data Sets] website.
*Some statistics can be found in the Census Bureau's [http://www.census.gov/geo/landview/lv6help/pop_estimate.html description] of LandView 6 software.


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Census block group — A census block group is a geographical unit used by the United States Census Bureau which is between the census tract and the census block. It is the smallest geographical unit for which the bureau publishes sample data, i.e data which is only… …   Wikipedia

  • Block — may refer to: * A way of controlling train movement in railway signalling * Postage stamp block, an attached group of postage stampsObjects* A large concrete or stone brick * Block (sailing), a single or multiple pulley used on sailboats *… …   Wikipedia

  • Census tract — A census tract, census area, or census district is a particular community defined for the purpose of taking a census. [cite web url=http://www.census.gov/geo/www/cen tract.html title=Census Tracts and Block Numbering Areas publisher=U. S. Census… …   Wikipedia

  • Block Island (Rhode Island) — Block Island Lage von Block Island Gewässer Atlantischer Ozean Geographische Lage …   Deutsch Wikipedia

  • Block Island — Infobox Settlement official name = New Shoreham, Rhode Island settlement type = Town nickname = imagesize = image caption = image mapsize = map caption = mapsize1 = map caption1 = subdivision type = Country subdivision type1 = State subdivision… …   Wikipedia

  • Block book — Apocalypse page Biblia Pauperum or Bible of the Poor , woodcut illustrations w …   Wikipedia

  • Census in Australia — The Australian census is administered by the Australian Bureau of Statistics every five years. The most recent census was conducted on 8 August 2006. Prior to the introduction of regular censuses in 1961, they have also been run in 1901, 1911,… …   Wikipedia

  • City block — For other uses, see City block (disambiguation). Diagram of an example of a rectangular city block as seen from above, surrounded by streets. The block is divided into lots which were numbered by the developer as shown in red here and as shown in …   Wikipedia

  • Domjur (community development block) — Domjur   Community development block   …   Wikipedia

  • Dubrajpur (community development block) — Dubrajpur   Community development block   …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.