Your organization can contribute its local, authoritative content through the Community Maps Program, which is a part of the ArcGIS Living Atlas of the World. Requires an ArcGIS Online Organizational Account.
Your data is integrated with data from other providers, and published and hosted by Esri as part of ArcGIS Online reference and thematic basemap layers.
Register your Community, and once approved, provide your data in the form of zipped layers or services.