Today, with more 200,000 datasets, it’s a lot more popular. Still, real-life demands for information about our governments, people and economy exceed the supply of available data.
The creation of a centralized portal for federal government data has fostered open data initiative across the country. Dozens of cities have established their own open data portals (here are 90 examples).
In the 50 years since the federal Freedom of Information Act was passed, US states have been gradually introducing similar laws (see freedom of information laws by state). Likewise, many are now developing state-level open data portals.
These state data resources vary in style and depth. Some look much like data.gov, and include a wide variety of datasets. But not every state has a comprehensive data portal yet, let alone deep selections of data.
Here’s a listing of general and geographic open data portals for US states, plus the District of Columbia and Puerto Rico..."