This is a csv export from https://covidtracking.com/race/dashboard, a dashboard that reports the "latest race and ethnicity data from every state and territory that reports it." This data is presented alongside corresponding population data for each racial or ethnic group from the Census Bureau’s 2018 ACS 5-Year estimates. Note that we have used standard Census categories for race and ethnicity throughout this dashboard, but many states are currently reporting their data using non-standard categories.
More information is available from the Web site. This is a project from The Atlantic.
About the data: https://covidtracking.com/race/about#download-the-data