Via 18F: “There are a lot of .gov domains: over 5,300 of them. About 1,300 of these are used by the federal government’s executive, legislative, and judicial branches. The rest are spread across states, territories, counties, cities, and native tribes. For a while now, the public has been able to download a dataset of the roughly 1,200 .gov domains used by the federal executive branch from Data.gov, the nation’s data catalog. We’re happy to say that the .gov registry is now releasing the entire set of 5,300 .gov domains, including those outside of the federal executive branch. Some background: the .gov registry is a centrally operated top-level domain managed by the Office of Government-wide Policy (OGP), which is part of the General Services Administration (GSA), an independent federal agency. The associated DotGov.gov provides more background, as well as tools such as WHOIS lookup and DNSSEC analysis. You can download the complete .gov domain list in CSV form here:

• https://gsa.github.io/data/dotgov-domains/2014-12-01-full.csv

We’re hosting it on GSA’s GitHub account, which also allows for easy in-browser viewing of the full list. Note: This dataset is an interim release and a snapshot in time, taken on December 1, 2014. The plan is for the complete dataset to be listed and regularly updated on Data.gov, replacing the current limited set. In the meantime, 18F and the Office of Government-wide Policy hope this data is useful to the public, and to anyone helping make the .gov landscape better.”