General Information: Parishes and Monasteries
Orthodoxy In America: An online directory of the Orthodox Church in North America. This is the best parish and monastery directory I've seen, though they do not list every Orthodox jurisdiction in the country. Please help them keep the database up-to-date by submitting/verifying your listing.
Russian Orthodox Church Abroad (ROCA).
Synod in Resistance (True [Old Calendar] Orthodox Church of Greece), Archdiocese of California (Etna).
Serbian Orthodox Church: SUC.org
Greek Orthodox Archdiocese of North America
Orthodox Church in America
Moscow Patriarchate (USA)
Moscow Patriarchate (Canada)
Orthodox Monasteries of North America
The Monasteries of Mt. Athos