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Q:  

What are the sizes of the geographic units for the 2007 ACS and how are they determined?

A:  

The 2007 release of the American Community Survey makes available for the first time data for geographic units with populations of 20,000. These areas will have data based on a 3-year estimate (2005-2007). Larger communities (65,000+) will have data based on both 1-year estimates (2005, 2006, 2007) as well as a 3-year estimate (2005-2007).

The size of an area is based on the Census Bureau's Population Estimates program.

To determine which counties and places will have data available, click on the links below for counties and places. In each case, the data are sorted by state and population size (descending). There is a column for the Census 2000 population size and then estimates for 2005, 2006, and 2007.

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