Link: https://www.cdc.gov/nchs/covid19/covid-19-mortality-data-files.htm
Description: List of publicly available mortality data sets for the U.S. from the CDC, related to excess mortality starting in 2020 as well as COVID-specific mortality. A few data sets are updated on weekdays, but others are updated weekly on Wednesdays (usually). A few ad hoc data sets from specific dates are at the end.
Publication Frequency: Weekly for most data sets
Publication Site: CDC