TABLE 2-5 Major Types of Geographic Areas for Which 1-Year, 3-Year, and 5-Year Period Estimates Are Available from the American Community Survey

Area Type

Estimate Type

1-Year Period

3-Year Period

5-Year Period

States and District of Columbia

51

51

51

Congressional districts

436

436

436

Public use microdata areas (PUMAs) (these areas have at least 100,000 people)

2,071

2,071

2,071

Metropolitan and micropolitan statistical areas

492

905

936

Urban areas

363

809

3,607

Counties and county equivalents

775

1,812

3,141

Cities, towns, and census-designated places

492

2,062

25,112

Townships and villages (minor civil divisions) (recognized for publication in 28 states)

186

984

21,200

School districts (elementary, secondary, and unified)

878

3,257

14,394

American Indian and Alaska Native areas

14

36

603

Census tracts

0

0

65,433

Block groups

0

0

208,790

NOTES: 1-year period estimates are available for governmental and statistical areas with at least 65,000 people; 3-year period estimates are available for governmental and statistical areas with at least 20,000 people; 5-year period estimates are available for all governmental and statistical areas, including census tracts (statistical areas of about 4,000 people) and block groups (statistical areas of about 1,500 people). Other areas for which estimates are provided (not shown) include combined statistical areas, Hawaiian Home Lands, urban and rural territory, areas inside and outside the principal city of a metropolitan or micropolitan statistical area, areas outside metropolitan and micropolitan areas.

SOURCE: Tabulation provided by the U.S. Census Bureau, February 21, 2007. Because of changes in population and geographic boundaries, the actual numbers of areas with estimates published may differ from the numbers shown.



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