2010 Census Summary File 1 Technical Documentation Note 1
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2010 Census Summary File 1 Issued September 2012 2010 Census of Population and Housing SF1/10-4 (RV) Technical Documentation U.S. Department of Commerce Economics and Statistics Administration U.S. CENSUS BUREAU For additional information concerning the files, contact the Customer Liaison and Marketing Services Office, Customer Services Center, U.S. Census Bureau, Washington, DC 20233, or phone 301-763-INFO (4636). For additional information concerning the technical documentation, contact the Administrative and Customer Services Division, Electronic Products Development Branch, U.S. Census Bureau, Washington, DC 20233, or phone 301-763-8004. 2010 Census Summary File 1 Issued September 2012 2010 Census of Population and Housing SF1/10-4 (RV) Technical Documentation U.S. Department of Commerce Rebecca M. Blank, Acting Secretary Rebecca M. Blank, Deputy Secretary Economics and Statistics Administration Vacant, Under Secretary for Economic Affairs U.S. CENSUS BUREAU Thomas L. Mesenbourg, Acting Director SUGGESTED CITATION FILES: 2010 Census Summary File 1— (name of state or United States) [machine-readable data files]/ prepared by the U.S. Census Bureau, 2011. TECHNICAL DOCUMENTATION: 2010 Census Summary File 1— Technical Documentation/prepared by the U.S. Census Bureau, Revised 2012. ECONOMICS AND STATISTICS ADMINISTRATION Economics and Statistics Administration Vacant, Under Secretary for Economic Affairs U.S. CENSUS BUREAU Thomas L. Mesenbourg, Acting Director Nancy A. Potok, Deputy Director and Chief Operating Officer Frank A. Vitrano, Acting Associate Director for Decennial Census Enrique J. Lamas, Associate Director for Demographic Programs Brian Monaghan, Acting Associate Director for Field Operations CONTENTS CHAPTERS 1. Abstract . 1-1 2. How to Use This Product. 2-1 3. Subject Locator. 3-1 4. Summary Level Sequence Chart. 4-1 5. List of Tables (Matrices). 5-1 6. Data Dictionary. 6-1 7. 2010 Census: Operational Overview and Accuracy of the Data . 7-1 8. User Updates. 8-1 APPENDIXES A. Geographic Terms and Concepts. A-1 B. Definitions of Subject Characteristics. B-1 C. Data Collection and Processing Procedures. C-1 D. Questionnaire. D-1 E. Maps. E-1 F. Code Lists. F-1 G. Residence Rule and Residence Situations for the 2010 Census of the United States. G-1 v Chapter 1. Abstract CONTENTS Citations ..................................................................... 1-1 Type of File ................................................................... 1-1 Subject Content ............................................................... 1-1 Geographic Content ............................................................ 1-2 User Updates ................................................................. 1-3 Related Products ............................................................... 1-3 CITATIONS 2010 Census Summary File 1 [name of state1 or United States]/prepared by the U.S. Census Bureau, 2011. 2010 Census Summary File 1 Urban/Rural Update [name of state1 or United States]/prepared by the U.S. Census Bureau, 2012. TYPE OF FILE Summary statistics. SUBJECT CONTENT Summary File 1 (SF 1) contains the data compiled from the questions asked of all people and about every housing unit. Population items include sex, age, race, Hispanic or Latino origin, household relationship, household type, household size, family type, family size, and group quarters. Housing items include occupancy status, vacancy status, and tenure (whether a housing unit is owner-occupied or renter-occupied). There are 177 population tables (identified with a ‘‘P’’) and 58 housing tables (identified with an ‘‘H’’) shown down to the block level; 82 population tables (identified with a ‘‘PCT’’) and 4 housing tables (identified with an “HCT”) shown down to the census tract level; and 10 population tables (identified with a “PCO”) shown down to the county level, for a total of 331 tables. The SF 1 Urban/Rural Update added 2 PCT tables, increasing the total number to 333 tables. There are 14 population tables and 4 housing tables shown down to the block level and 5 population tables shown down to the census tract level that are repeated by the major race and Hispanic or Latino groups.2 SF 1 includes population and housing characteristics for the total population, population totals for an extensive list of race (American Indian and Alaska Native tribes, Asian, and Native Hawaiian and Other Pacific Islander) and Hispanic or Latino groups, and population and housing characteristics for a limited list of race and Hispanic or Latino groups. Population and housing items may be cross-tabulated. Selected aggregates and medians also are provided. A complete listing of subjects in this file is found in the “Subject Locator” chapter. 1 This includes the District of Columbia and Puerto Rico. 2 These selected tables are repeated by the following: White alone; Black or African American alone; American Indian and Alaska Native alone; Asian alone; Native Hawaiian and Other Pacific Islander alone; Some Other Race alone; Two or More Races; Hispanic or Latino; and White alone, not Hispanic or Latino. One table, PCT12, is also repeated by Black or African American alone, not Hispanic or Latino; American Indian and Alaska Native alone, not Hispanic or Latino; Asian alone, not Hispanic or Latino; Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino; Some Other Race alone, not Hispanic or Latino; and Two or More Races, not Hispanic or Latino. Abstract 1-1 U.S. Census Bureau, 2010 Census Summary File 1 GEOGRAPHIC CONTENT Summary File 1 (SF 1) is released as individual files for each of the 50 states, the District of Columbia, and Puerto Rico, and for the United States. The tables (matrices) are identical for all files, but the geographic coverage differs. SF 1 for states was released from June–August 2011. The national update file, without urban and rural components, was released in October 2011. The Urban/Rural Update of SF 1 also was released as individual files for the 50 states, the District of Columbia, Puerto Rico, and for the United States in September 2012. This abstract lists the most frequently accessed geographic levels. The “Summary Level Sequence Chart” chapter outlines the hierarchical and inventory geographic summaries in their entirety. Two summary level sequence charts are provided: for the state files and the national update file. Additional summary level sequence charts are added for the SF 1 Urban/Rural update. State Files SF 1 for states, the District of Columbia, and Puerto Rico provides data for these areas and their subareas in hierarchical sequence down to the block level (P and H tables), the census tract level (PCT and HCT tables), or the county level (PCO tables), depending on the detail shown in the table. The file structure includes, but is not limited to the following geographic levels: State3 County4 County subdivision5 Place (or place part) Census tract Block group Block American Indian and Alaska Native area and Hawaiian home land SF 1 for states also has inventory (complete) summaries for the following geographic levels: Place Metropolitan statistical area (or state portion) Micropolitan statistical area (or state portion) Urban area (Urban/Rural Update file only) Congressional district (111th Congress) State legislative district School district Consolidated city ZIP Code® tabulation area (ZCTA™) (or state portion) 3 This includes states, the District of Columbia, and Puerto Rico. 4 Parish in Louisiana; borough, census area, city and borough, or municipality in Alaska; and municipio in Puerto Rico. In Maryland, Missouri, Nevada, and Virginia, one or more cities are independent of counties and are treated as statistical equivalents of counties. The entire District of Columbia, which has no counties, is treated as a county equivalent. 5 In Puerto Rico, some county subdivisions (barrios-pueblos and barrios) are divided into subminor civil divisions (subbarrios). 1-2 Abstract U.S. Census Bureau, 2010 Census Summary File 1 National Files SF 1 national files provide summaries for the entire United States. The file structure includes, but is not limited to the following geographic levels: United States Region Division State County County subdivision Place (or place part) Metropolitan statistical area Micropolitan statistical area Urban area (Urban/Rural Update file only) Congressional district (111th Congress) State legislative district American Indian and Alaska Native area and Hawaiian home land ZIP Code® tabulation area (ZCTA™) USER UPDATES User updates inform data users about corrections, errata, and related explanatory information. However, sometimes this information becomes available too late to be reflected in the product or related documentation. User updates are available on the U.S. Census Bureau’s Internet site at <www.census.gov /prod/cen2010/index.html>. RELATED PRODUCTS Listed below are the other related products available through American FactFinder. Some products will be available as printed reports. 2010 Census Summary File 2 (SF 2). Files containing cross-tabulations of information on age, sex, household relationship, household type, household size, family type, family size, group quarters population, occupancy status, tenure, etc., for many race and Hispanic or Latino groups and American Indian and Alaska Native tribes. The file for each state includes data down to the census tract level, if there are 100 or more people of the specified population group in a given geographic area. Other tabulations are available only