Census 2010

Apportionment Data

Apportionment is the process of dividing the 435 memberships, or seats, in the House of Representatives among the 50 states based on the population figures collected during the decennial census. The apportionment population consists of the resident population of the 50 states, plus the overseas military and federal civilian employees and their dependents living with them who could be allocated to a state.

Redistricting Data - P.L. 94-171

This product contains summary statistics on population and housing subjects derived from questions on the 2010 Census questionnaire. Population counts for the total population and for the population 18 years and over are presented in four tables:

  • A count of all persons by race.
  • A count of the population 18 years and over by race.
  • A count of Hispanic or Latino and a count of not Hispanic or Latino by race for all persons.
  • A count of Hispanic or Latino and a count of not Hispanic or Latino by race for the population 18 years and over.
  • Housing occupancy status (the number of housing units that are occupied or vacant).

Demographic Profile Summary File (DPSF)

The Demographic Profile Summary File contains 100 percent data asked of all people and about every housing unit on topics such as sex, age, race, Hispanic or Latino origin, household relationship, household type, group quarters population, housing occupancy, and housing tenure.

Summary File 1 Data

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. 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. 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.

Summary File 1 Urban/Rural Update Data

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. 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.

Summary File 2 Data

Summary File 2 (SF 2) contains the data compiled from the questions asked of all people and about every housing unit. SF 2 includes population characteristics, such as sex, age, average household size, household type, and relationship to householder such as nonrelative or child. The file includes housing characteristics, such as tenure (whether a housing unit is owner-occupied or renter-occupied), age of householder, and household size for occupied housing units. Selected aggregates and medians also are provided. The layout of the tables in SF 2 is similar to those in SF 1. These data are presented in 47 population tables (identified with a "PCT") and 14 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 71 tables. Each table is iterated for 331 population groups: the total population, 75 race categories, 114 American Indian and Alaska Native categories (reflecting 60 tribal groupings), 47 Asian categories (reflecting 24 Asian groups), 43 Native Hawaiian and Other Pacific Islander categories (reflecting 22 Native Hawaiian and Other Pacific Islander groups) and 51 Hispanic/ not Hispanic groups. The presentation of SF 2 tables for any of the 331 population groups is subject to a population threshold of 100 or more people. That is, if there are fewer than 100 people in a specific population group in a specific geographic area, their population and housing characteristics data are not available for that geographic area in SF 2.