Provides CO2 emissions from the combustion of fossil fuel and cement production in 1 km2 geographic resolution from 2010-2022 broken out by sector (electricity production, industrial, commercial, residential, airport, nonroad, onroad, railroad, commercial marine vessels, and cement production) and fuel type (coal, petroleum, and natural gas). Estimates are also aggregated to the county and state levels. For more details, see Gurney, K.R., Dass, P., Kato, A. et al. Vulcan version 4.0 high-resolution annual carbon dioxide emissions in the U.S. for the 2010–2022 time period. Sci Data 12, 1946 (2025).