The National Centers for Environmental Information (NCEI) is a U.S. government agency that manages one of the world's largest archives of atmospheric, coastal, geophysical, and oceanic data. The current director is Deke Arndt.

NCEI is operated by the National Environmental Satellite, Data, and Information Service (NESDIS), an office of the National Oceanic and Atmospheric Administration (NOAA), which operates under the U.S. Department of Commerce.

In addition to archiving data, NCEI develops products and services that make data readily available to scientists, government officials, the business community, academia, non-governmental organizations, and the general public.

NCEI provides environmental data, products, and services covering the depths of the ocean to the surface of the Sun.

NCEI was created in 2015 from the merger of three NOAA data centers:

NCEI was established by the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235 in response to increasing demand for environmental information. The organization was created by merging the three existing NOAA National Data Centers with the goal of streamlining the collection and preservation of environmental data.

The merger, which came in response to increasing demand for environmental information, was intended to make NOAA's data more useful through the application of consistent data stewardship practices across all science disciplines. NCEI works with the ISC World Data System to make data free and accessible.

In September, 2024, the NCEI headquarters in Asheville were buffeted by storm conditions and flooding from Hurricane Helene. Severe damage was done to infrastructure, limiting network services and website availability. Archived data was rendered inaccessible, certain webpages suffered limited availability, and the monthly climate reports for September were postponed. They confirmed on October 4th that all data products, however, were safe.