In the Orthodox Church in America (OCA), the diocese is the basic church body that comprises all the parishes of a determined geographical area. It is governed by the Diocesan Bishop, with the assistance of a Diocesan Assembly and a Diocesan Council. The OCA is currently composed of twelve geographic and three ethnic dioceses. The boundaries of the ethnic dioceses overlap those of certain geographic ones. These dioceses are the result of smaller ethnic jurisdictions joining the OCA at some point in its history, usually after having broken from other bodies.
The Stavropegial Institutions are churches, monastic communities, and theological schools that are under the jurisdiction of the OCA's primate, Metropolitan Tikhon (Mollard).
DioceseBishopTerritoryChanceryDiocese of AlaskaArchbishop Alexis (Trader)AlaskaAnchorage, AKAlbanian ArchdioceseBishop Nikodhim (Preston)California, Connecticut, Massachusetts, Michigan, New York, Ohio, PennsylvaniaSouth Boston, MABulgarian DioceseArchbishop Alexander (Golitzin)California, Illinois, Indiana, Kansas, Michigan, Ohio, Ontario, Washington, D.C.Toledo, OHArchdiocese of CanadaArchbishop Irénée (Rochon)Alberta, British Columbia, Manitoba, Ontario, Quebec, SaskatchewanSpencerville, OntarioDiocese of Eastern PennsylvaniaArchbishop Mark (Maymon)Delaware, PennsylvaniaSouth Canaan, PADiocese of MexicoArchbishop Alejo (Pacheco y Vera)Chiapas, Jalisco, Mexico City, Mexico, VeracruzMéxico D.F.Diocese of the Midwest Archbishop Daniel (Brum)Iowa, Illinois, Indiana, Kansas, Michigan, Minnesota, Missouri, North Dakota, Nebraska, Ohio, WisconsinChicago, ILDiocese of New EnglandBishop Benedict ChurchillConnecticut, Massachusetts, Maine, New Hampshire, Rhode Island, VermontSouthbridge, MADiocese of New York and New JerseyArchbishop Michael (Dahulich)New Jersey, New YorkSyosset, NYRomanian Orthodox Episcopate of AmericaArchbishop Nathaniel (Popp)Alberta, Arizona, British Columbia, California, Colorado, Connecticut, Florida, Georgia, Illinois, Indiana, Massachusetts, Manitoba, Maryland, Michigan, Minnesota, Missouri, New Hampshire, New Mexico, Nevada, New York, Ohio, Ontario, Oregon, Pennsylvania, Quebec, Rhode Island, Saskatchewan, Tennessee, Texas, Virginia, WashingtonJackson, MIDiocese of the SouthArchbishop Alexander (Golitzin)Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, New Mexico, Oklahoma, South Carolina, Tennessee, Texas, VirginiaDallas, TXArchdiocese of WashingtonMetropolitan Tikhon (Mollard)Delaware, Maryland, Virginia, Washington, D.C.Washington, D.C.Diocese of the WestBishop Vasily (Permiakov)Arizona, California, Colorado, Hawaii, Montana, Nevada, Oregon, WashingtonLos Angeles, CAArchdiocese of Pittsburgh and Western PennsylvaniaArchbishop Melchisidek (Pleska)Ohio, Pennsylvania, West VirginiaCranberry Township, PAStavropegial InstitutionsMetropolitan Tikhon (Mollard)New York, Ontario, PennsylvaniaSyosset, NY
Sources OCA listing of dioceses