Newly listed sites

Seattle's public-data portal

Los Angeles public data and geographic resources

Chicago's public dataset catalogue

New York City public datasets and learning resources

Ohio's statewide geographic-data resources

New Mexico's geographic-data resource

Mississippi's geographic-information clearinghouse

Maine's geographic-data catalogue

New Jersey public-data discovery and guidance

Pennsylvania public data and spatial-data links

Delaware datasets and publishing resources

Massachusetts data collections and agency sub-hubs

Vermont's public-data catalogue

Illinois public-data catalogue and guides

Iowa public datasets organised by service area

Hawaiʻi's open-data and data-governance gateway

Oregon public data and programme reporting

Washington state's open-data platform

Colorado public datasets across several subjects

Connecticut's public dataset catalogue

Maryland's public-data portal

Texas's state data portal and linked resources

New York state datasets, maps and charts

Open datasets from California state departments