State of Washington (data.wa.gov) publishes 1,070 open datasets for United States. Browse them live in Vizzie and turn any one into a map or chart.
State of Washington (data.wa.gov) is the open-data portal for United States, covering Washington. It runs on Socrata, Tyler Technologies' open-data platform. You can browse it directly at data.wa.gov.
On State of Washington (data.wa.gov), a majority of datasets here declare no licence at all. It's important to know that "no licence declared" is not the same as public-domain or free-to-use. Undeclared data carries no explicit permission to copy, adapt, or redistribute it — so reusers should treat it cautiously and check with the publisher before relying on it. Vizzie flags each dataset's licence (or its absence) so you can see this before you build.
Of the 333 datasets here whose licence Vizzie can identify, essentially all of them can be used commercially; 7% carry a share-alike condition, so work built on them has to be published under the same terms; 0% are non-commercial only; 6% forbid derivatives, which rules out remapping them. Attribution is required by almost every open licence — Vizzie writes the attribution line for you when you export or publish.
Only 55% of datasets on State of Washington (data.wa.gov) name a publisher, so this covers that part of the catalogue rather than all of it.
No download, no GIS specialist. Opens in Vizzie.