This is a interactive map of public North American Druid Groves and study groups. Compiled using original sources (like order lists), it has current contact information and is updated several times a year. The map includes over 289 groups across 5 countries- so far.
Even if you find no nearby group on the map, consider contacting regional groups as they may know of individual Druids in your area that also want a local community.
This MS Word document file lists Reformed Druids of North America (& related American) groups, including several large scale, static maps. The Guide is updated every year or so, but may include some inactive groups or contacts. The maps include RDNA groups (but may not be complete for other orders).