This Modified Race Summary File contains modified counts by race categories based on Census 2010 data tabulated by five year age, sex, and Hispanic origin categories for counties and county equivalents in the United States and Puerto Rico. The Census Bureau's Population Estimates Program modifies the tabulated race data for use in the production of Census 2010 based postcensal population estimates and projections. The modification reconciles the Census 2010 race categories with race categories that appear, or will appear, in the data from administrative records, which we use to produce population estimates and projections. The modification in this summary file does not correct or adjust Census 2010 tabulating or coding procedures for race data, nor does it correct for undercoverage or duplication of persons in Census 2010.

Many state and local agencies comply with the U.S. Office of Management and Budget (OMB) 1997 revised standards for the collection, tabulation, and presentation of federal data on race and ethnicity. These revised OMB standards identify a minimum of five racial categories: White; Black or African American; American Indian and Alaska Native; Asian; and Native Hawaiian and Other Pacific Islander. Much like Census 2000, in Census 2010, respondents were given the option to mark one or more races on the questionnaire to indicate their racial identity. When these Census 2010 counts are displayed, they show data for people who reported a race either alone or in combination with other races.

To allow for Census 2010 respondents who do not identify with any of the above five OMB race categories, OMB approved Census Bureau's inclusion of a sixth race category: Some Other Race. Space was provided on the questionnaire to allow respondents to also write in their race if their selected response category was Some Other Race.

Because of needs to have census data comparable with the reporting categories used by state and local agencies and for compiling other administrative data used in producing population estimates and projections, the Census Bureau developed a procedure to assign an OMB race to those who reported Some Other Race. (For more information about race classifications in Census 2010, see the Census Bureau's publication "Overview of Race and Hispanic Origin: 2010" at: www.census.gov/prod/cen2010/briefs/c2010br-02.pdf.)

This summary file provides data from Census 2010 that have been modified to assign each of the persons who selected the Some Other Race category to an OMB race category. The modified race data include 31 race groups (five Office of Management and Budget single race categories and every combination of those five).

The following describes the modifications used to reconcile the Census 2010 race categories with those race categories that appear in the data from administrative records, which are used to produce population estimates and projections.

METHODOLOGY

Definitions

Categorization of Census 2010 Race Responses

Modification Procedures

Race Allocation Guidelines

• Within household race allocation:
  • Donors and donees must match on the specific Hispanic origin (Not Hispanic or Latino; Mexican; Puerto Rican; Cuban; Central American and Dominican; South American; other Spanish).
  • Donors were permitted to have a race and Hispanic origin that was allocated or edited as part of the Census 2010 edit procedures.
  • Donors were permitted to have a race that was modified.
  • The within-household allocation was consistent with the household relationship guidelines used in Census 2010 procedures.

• Race allocation from the hot deck matrix:
• Donors and donees must match on specific Hispanic origin (Not Hispanic or Latino; Mexican; Puerto Rican; Cuban; Central American and Dominican; South American; other Spanish). Donors could not have a race or Hispanic origin that had been allocated or edited as part of the Census 2010 procedures.
• Donors could not have a race that had been modified.
• Donors were permitted to have an edited age but had to be in the same broad agerange (0-14, 15-34, 35-54, 55+).
• Hot deck guidelines were consistent with the Census 2000 procedures.

1. White alone
2. Black or African American alone
3. American Indian and Alaska Native alone
4. Asian alone
5. Native Hawaiian and Other Pacific Islander alone
6. White and Black or African American
7. White and American Indian and Alaska Native
8. White and Asian
9. White and Native Hawaiian and Other Pacific Islander
10. Black or African American and American Indian and Alaska Native
11. Black or African American and Asian
12. Black or African American and Native Hawaiian and Other Pacific Islander
13. American Indian and Alaska Native and Asian
14. American Indian and Alaska Native and Native Hawaiian and Other Pacific Islander
15. Asian and Native Hawaiian and Other Pacific Islander
16. White and Black or African American and American Indian and Alaska Native
17. White and Black or African American and Asian
18. White and Black or African American and Native Hawaiian and Other Pacific Islander
19. White and American Indian and Alaska Native and Asian
20. White and American Indian and Alaska Native and Native Hawaiian and Other Pacific Islander
21. White and Asian and Native Hawaiian and Other Pacific Islander
22. Black or African American and American Indian and Alaska Native and Asian
23. Black or African American and American Indian and Alaska Native and Native Hawaiian and Other Pacific Islander
24. Black or African American and Asian and Native Hawaiian and Other Pacific Islander
25. American Indian and Alaska Native and Asian and Native Hawaiian and Other Pacific Islander
26. White and Black or African American and American Indian and Alaska Native and Asian
27. White and Black or African American and American Indian and Alaska Native and Native Hawaiian and Other Pacific Islander
28. White and Black or African American and Asian and Native Hawaiian and Other Pacific Islander
29. White and American Indian and Alaska Native and Asian and Native Hawaiian and Other Pacific Islander
30. Black or African American and American Indian and Alaska Native and Asian and Native Hawaiian and Other Pacific Islander
31. White and Black or African American and American Indian and Alaska Native and Asian and Native Hawaiian and Other Pacific Islander