2020 Census Counties; PA, NJ, DE & MD

*USE geoid TO JOIN DATA DOWNLOADED FROM DATA.CENSUS.GOV* The TIGER/Line Shapefiles are extracts of selected geographic and cartographic information from the Census Bureau's Master Address File (MAF)/Topologically Integrated Geographic Encoding and Referencing (TIGER) System (MTS). The TIGER/Line Shapefiles contain a standard geographic identifier (GEOID) for each entity that links to the GEOID in the data from censuses and surveys. The TIGER/Line Shapefiles do not include demographic data from surveys and censuses (e.g., Decennial Census, Economic Census, American Community Survey, and the Population Estimates Program). Other, non-census, data often have this standard geographic identifier as well. Data from many of the Census Bureau’s surveys and censuses, including the geographic codes needed to join to the TIGER/Line Shapefiles, are available at the Census Bureau’s public data dissemination website (https://data.census.gov/). 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, municipalities, and census areas; the latter of which are delineated cooperatively for statistical purposes by the State of Alaska and the Census Bureau. Additionally, 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. 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 in decennial censuses. All of the counties in Connecticut and Rhode Island and nine counties in Massachusetts were dissolved as functioning governmental entities; however, the Census Bureau continues to present data for these historical entities in order to provide comparable geographic units at the county level of the geographic hierarchy for these states and represents them as nonfunctioning legal entities in data products. Each county or statistically equivalent entity is assigned a three-character numeric Federal Information Processing Series (FIPS) code based on alphabetical sequence that is unique within state, and an eight-digit National Standard (NS) code. Downloaded from https://www2.census.gov/geo/tiger/TIGER2022/COUNTY/ on June 22, 2023**使用地理标识符（GEOID）关联从data.census.gov下载的数据集** TIGER/Line形状文件（TIGER/Line Shapefiles）是从美国人口普查局主地址文件（Master Address File, MAF）/拓扑集成地理编码与参照系统（Topologically Integrated Geographic Encoding and Referencing, TIGER, 简称MTS）中抽取的精选地理与制图信息集合。此类文件为每个地理实体配备标准地理标识符（GEOID），可与人口普查及调查数据中的GEOID建立关联。 TIGER/Line形状文件不包含普查与调查类人口统计数据，例如十年一次人口普查、经济普查、美国社区调查以及人口估计计划的数据。其他非普查类数据源通常也带有该标准地理标识符。美国人口普查局的多项普查与调查数据（包括可用于关联TIGER/Line形状文件的地理编码信息）均可在普查局的公开数据发布网站https://data.census.gov/ 获取。 大多数州的一级法定区划为县。在路易斯安那州，此类区划称为堂区。阿拉斯加州无县建制，其等效地理实体包括组织自治市、市县自治体、自治市以及普查区域；其中普查区域由阿拉斯加州与美国人口普查局为统计目的共同划定。 此外，普查局在数据呈现中还将以下实体视为县级等效单元：波多黎各的自治市、美属萨摩亚的区与岛屿、北马里亚纳群岛联邦的自治市，以及美属维尔京群岛的岛屿。 在马里兰州、密苏里州、内华达州与弗吉尼亚州，存在一个或多个独立于任何县建制的建制市，此类城市构成所在州的一级区划单元，被称为独立市，在数据呈现中被视为县级等效实体。 哥伦比亚特区与关岛无一级区划，在十年一次人口普查的数据呈现中，二者整体均被视为县级等效单元。 康涅狄格州、罗得岛州的所有县以及马萨诸塞州的九个县已不再作为实际运行的政府实体存在，但普查局仍会保留这些历史实体的数据呈现，以在这些州的地理层级体系中提供可比的县级地理单元，并在数据产品中将其标记为非运行法定实体。 每个县级或统计等效实体将被分配一个基于字母顺序的3位数字联邦信息处理系列（Federal Information Processing Series, FIPS）代码，该代码在州内唯一，同时配备一个8位的国家统一（National Standard, NS）代码。 本数据集于2023年6月22日从https://www2.census.gov/geo/tiger/TIGER2022/COUNTY/ 下载。