County Political Boundaries (National)

Metadata Updated: April 11, 2017

County boundaries with political limit - boundaries extending into the ocean (NTAD). The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The primary legal divisions of most States are termed counties. In Louisiana, these divisions are known as parishes. In Alaska, which has no counties, the equivalent entities are the organized boroughs, city and boroughs, and municipalities, and for the unorganized area, census areas. The latter are delineated cooperatively for statistical purposes by the State of Alaska and the Census Bureau. In four States (Maryland, Missouri, Nevada, and Virginia), there are one or more incorporated places that are independent of any county organization and thus constitute primary divisions of their States. These incorporated places are known as independent cities and are treated as equivalent entities for purposes of data presentation. The District of Columbia and Guam have no primary divisions, and each area is considered an equivalent entity for purposes of data presentation. The Census Bureau treats the following entities as equivalents of counties for purposes of data presentation: Municipios in Puerto Rico, Districts and Islands in American Samoa, Municipalities in the Commonwealth of the Northern Mariana Islands, and Islands in the U.S. Virgin Islands. The entire area of the United States, Puerto Rico, and the Island Areas is covered by counties or equivalent entities. The boundaries for counties and equivalent entities are mostly as of January 1, 2013, primarily as reported through the Census Bureau's Boundary and Annexation Survey (BAS). However, some changes made after January 2013, including the addition and deletion of counties, are included.

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Metadata Date November 8, 2016
Metadata Created Date April 11, 2017
Metadata Updated Date April 11, 2017
Reference Date(s) January 1, 2016 (publication)
Frequency Of Update

Metadata Source

Harvested from National Transportation Atlas Database (NTAD) Metadata

Additional Metadata

Resource Type Dataset
Metadata Date November 8, 2016
Metadata Created Date April 11, 2017
Metadata Updated Date April 11, 2017
Reference Date(s) January 1, 2016 (publication)
Responsible Party Office of the Assistant Secretary for Research and Technology/Bureau of Transportation Statistics (Point of Contact)
Contact Email
Access Constraints Use Constraints: The TIGER/Line Shapefile products are not copyrighted however TIGER/Line and Census TIGER are registered trademarks of the U.S. Census Bureau. These products are free to use in a product or publication, however acknowledgement must be given to the U.S. Census Bureau as the source. The boundary information in the TIGER/Line Shapefiles are for statistical data collection and tabulation purposes only; their depiction and designation for statistical purposes does not constitute a determination of jurisdictional authority or rights of ownership or entitlement and they are not legal land descriptions.Coordinates in the TIGER/Line shapefiles have six implied decimal places, but the positional accuracy of these coordinates is not as great as the six decimal places suggest., Access Constraints: None
Bbox East Long 179.859666
Bbox North Lat 71.441059
Bbox South Lat -14.601806
Bbox West Long -179.231101
Coupled Resource
Frequency Of Update
Harvest Object Id ef839e7e-7811-4357-8ba7-d51d892f79a7
Harvest Source Id cb3fd614-b933-4b6c-a804-65b87601cc3f
Harvest Source Title National Transportation Atlas Database (NTAD) Metadata
Licence See access and use constraints information.
Metadata Language
Metadata Type geospatial
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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