The New York Times is actively mapping COVID-19 cases and deaths in the United States at the county level to provide granular data that helps local officials manage medical surges and social distancing measures. The mapping includes visualizations of total cases and deaths, as well as per capita rates, facilitating the identification of hotspots and disparities across different regions. The U.S. is experiencing its highest number of known cases globally, with over 3,000 deaths reported on the deadliest day of the pandemic, highlighting the challenges faced by hospitals in securing protective gear and by political leaders in deciding how to reopen the economy. This data is compiled by a team of journalists working across time zones, and it is made publicly available on GitHub.