MARCH 6, 2025 – The U.S. Census Bureau today released the 2020 Modified Age and Race Census (MARC) file. These tables provide data from the 2020 Census in race categories that align with those used in vital records and administrative data (which may not include “Some Other Race”) and are consistent with those used in the Population Estimates Program. Data are available for the nation, states and counties by single year of age, sex, race and Hispanic origin. 

The Census Bureau developed the MARC file by reassigning responses from the “Some Other Race” (SOR) category in the 2020 Census to the five race categories defined by the 1997 U.S. Office of Management and Budget revised standards for the collection, tabulation and presentation of federal data on race and ethnicity.

Additionally, the MARC file incorporates modified age values for a subset of responses to address age heaping, resulting in a more accurate age distribution than the original 2020 Census results.

Visit the Modified Race Data webpage to access the 2020 MARC files, along with modified race data from the 2000 and 2010 Censuses. 

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