Kingdoms are the largest regional groupings within the SCA. As of 2015, twenty individual Kingdoms covered all territory on Earth. Each Kingdom is nominally independent of the others, and may develop their own laws in accordance with the demands of the populace and the whims of royalty, so long as those laws do not conflict with Corpora. The yearly numbering scheme used by the SCA, Anno Societatis ('Year of the Society, abbreviated '"AS), is dated from the founding of the Society in Berkeley California on May 1st, 1966. Each Kingdom is led by a Sovereign and their Consort. Reigns last for six months (four months in the West), and heirs are determined by prowess in heavy combat.
Originally, the West Kingdom claimed all lands west of the Mississippi, and the East Kingdom everything eastwards. As local groups grew in size, each of the first two kingdoms ceded some territories to create new kingdoms, some of which in turn have been further subdivided as the populace has grown. For example the newest Kingdom, Avacal, was created from territories in the kingdom of An Tir, which had in turn been created from the West.
|West||May 1, A.S. 1 (1966)||USA: Northern California, Nevada and Alaska;|
Asia: Japan, Korea, Thailand, and Pacific Rim
|East||June, A.S. 3 (1968)||USA: eastern Pennsylvania, eastern New York, Delaware, New Jersey, Connecticut, Rhode Island, Massachusetts, Vermont, New Hampshire, Maine|
Canada: Quebec, Prince Edward Island, Nova Scotia, New Brunswick and Newfoundland.
|Middle||September, A.S. 4 (1969)||USA: Michigan, Ohio, Indiana, Illinois, Scott County in Iowa, parts of Kentucky (except the southwest counties)|
Canada: Essex County and Windsor in Ontario.
|Atenveldt||January, A.S. 5 (1971)||USA: Arizona|
|Meridies||January, A.S. 12 (1978)||USA: Alabama, almost all of Georgia, a bit of the panhandle of Florida, most of Tennessee, and parts of southern Kentucky (Allen, Barren, Calloway, Logan, Simpson, and Warren counties)|
|Caid||June, A.S. 13 (1978)||USA: Southern California, Greater Las Vegas Area, and Hawaii|
|Ansteorra||June, A.S. 14 (1979)||USA: Oklahoma, and Texas east of the Mountain time zone.|
|Atlantia||May, A.S. 16 (1981)||USA: Maryland, District of Columbia, North and South Carolina, Virginia, Augusta, Georgia.|
|An Tir||January, A.S. 16 (1982)||USA: Oregon, Washington, the northern tip of Idaho|
Canada: most of British Columbia, Yukon and Northwest Territories
|Calontir||February, A.S. 18 (1984)||USA: Kansas, Missouri, Iowa, Nebraska, Northern Arkansas|
|Trimaris||September A.S. 20 (1985)||USA: Majority of Florida; lays claim to Panama; lays claim to space due to NASA's presence in Florida|
|the Outlands||June, A.S. 21 (1986)||USA: New Mexico, most of Colorado, parts of Nebraska; Eastern Wyoming, and El Paso & Hudspeth counties in Texas|
|Drachenwald||June, A.S. 28 (1993)||Europe, Africa, Middle East|
|Artemisia||July, A.S. 32 (1997)||USA: Montana, southern Idaho, most of Utah, western Colorado, and Western Wyoming (Evanston, Green River, and Rock Springs)|
|Æthelmearc||September, A.S. 32 (1997)||USA: central/western Pennsylvania, western New York, and West Virginia.|
|Ealdormere||October, A.S. 33 (1998)||Canada: Ontario (except for Essex County, and Northwestern Ontario around Thunder Bay.)|
|Lochac||July, A.S. 37 (2002)||Australia and New Zealand; parts of Antarctica|
|Northshield||October, A.S. 39 (2004)||USA: North Dakota, South Dakota, Minnesota, Wisconsin, the Upper Peninsula of Michigan|
Canada: Manitoba and Northwestern Ontario.
|Gleann Abhann||November, A.S. 40 (2005)||USA: Mississippi, Louisiana, most of Arkansas, and Memphis, Tennessee|
|Avacal||June, A.S. 50 (2015)||Canada: eastern British Columbia, Alberta, Saskatchewan|
|Kingdoms of the Known World|
|Æthelmearc · Ansteorra · An Tir · Artemisia · Atenveldt · Atlantia · Avacal · Caid · Calontir · Drachenwald · Ealdormere · East · Gleann Abhann · Lochac · Meridies · Middle · Northshield · Outlands · Trimaris · West|