Racial and Ethnic Composition

Population Share by Race & Ethnicity

Santa Clara & San Mateo Counties

Data Source:

United States Census Bureau, 2010 and 2020 Census Redistricting Data

Analysis:

Silicon Valley Institute for Regional Studies

Data are from the United States Census Bureau, 2010 and 2020 Census Redistricting Data (P.L. 94-171) Summary File. (Note: the P.L. 94-171 data do not reflect the California Statewide Database reallocation of incarcerated persons that were enumerated in facilities under the control of the California Department of Corrections and Rehabilitation to their last residential address.) Silicon Valley data include Santa Clara and San Mateo counties plus the following four cities: Fremont, Newark, Union City, and Scotts Valley. Multiple & Other includes American Indian and Alaska Native alone, Native Hawaiian and Other Pacific Islander alone, Some other race alone, and Two or more races. Asian, White, Black or African-American, and Multiple & Other are Non-Hispanic or Latino. The Diversity Index calculation for Silicon Valley utilized the formula from the U.S. Census Bureau 2020 Census: Racial and Ethnic Diversity Index by State (August 12, 2021), originally from Phillip Meyer and Shawn McIntosh, “The USA Today Index of Ethnic Diversity,” International Journal of Public Opinion Research (Volume 4, Issue 1), 1992. The index includes population estimates encompassing Joint Venture’s city-defined region, and is calculated as: DI = 1 – (H² + W² + B² + AIAN² + Asian² + NHPI² + SOR² + Multi²) where H is %Hispanic or Latino, W is %White alone, B is %Black or African American alone, AIAN is %American Indian and Alaska Native alone, Asian is %Asian alone, NHPI is %Native Hawaiian and Other Pacific Islander alone, SOR is %Some Other Race alone, MULTI is %Two or More Races. Estimates for all races included in the calculation are non-Hispanic or Latino. The Diversity Index (DI) indicates the probability that two people chosen at random will be from different racial and/or ethnic groups; a DI of zero indicates no diversity, whereas a DI of 1 indicates complete diversity (everyone is of a different race and/or ethnicity). The probabilities have been converted into percentages to make them easier to interpret.

The pie charts do not have any footnotes.

Diversity Index (line chart) note: The Diversity Index (DI) indicates the probability that two people chosen at random will be from different racial and/or ethnic groups; a DI of zero indicates no diversity, whereas a DI of 1 indicates complete diversity (everyone is of a different race and/or ethnicity). The probabilities have been converted into percentages to make them easier to interpret.

Resources for Relevant Data and Reports (show)

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