Commonwealths


 * United States, a pre-War federal republic comprised of 13 Commonwealths.
 * Northwest Commonwealth, appearing in Fallout 2, the Fallout 3 add-on Operation: Anchorage, Project V13 and mentioned in Fallout 3, Fallout: New Vegas and its add-on Honest Hearts, Fallout Extreme, the Fallout Bible and J.E. Sawyer's Fallout Role-Playing Game.
 * New England Commonwealth, mentioned in Fallout 3 and J.E. Sawyer's Fallout Role-Playing Game.
 * The Commonwealth, what is left of the pre-War American state of Massachusetts in New England, mentioned in Fallout 3 and its add-ons, The Pitt, Broken Steel and Point Lookout.
 * East Central Commonwealth, mentioned in Fallout 3 and J.E. Sawyer's Fallout Role-Playing Game.
 * Northern Commonwealth, mentioned in Fallout 3, Fallout: New Vegas and its add-on Honest Hearts, and J.E. Sawyer's Fallout Role-Playing Game.
 * Southeast Commonwealth, mentioned in the Fallout 3 add-on Point Lookout, the Fallout: New Vegas add-on Lonesome Road and J.E. Sawyer's Fallout Role-Playing Game.
 * Columbia Commonwealth, mentioned in Fallout 3 and its add-ons, Broken Steel, Mothership Zeta, Operation: Anchorage and Point Lookout.
 * Eastern Commonwealth, mentioned in Fallout 3 and appearing in its add-on The Pitt, mentioned in the Fallout: New Vegas add-on Dead Money, Fallout Extreme, the Fallout Bible and J.E. Sawyer's Fallout Role-Playing Game.
 * Four States Commonwealth, appearing in Fallout: New Vegas and its add-on Honest Hearts, Fallout Tactics and Van Buren and mentioned in the Fallout: New Vegas add-on Lonesome Road.
 * Plains Commonwealth, appearing in Fallout Tactics and Van Buren, and mentioned in Fallout 3 and J.E. Sawyer's Fallout Role-Playing Game.
 * Texas Commonwealth, appearing in Fallout: Brotherhood of Steel and Fallout: Brotherhood of Steel 2 and mentioned in Van Buren, the Fallout Bible and J.E. Sawyer's Fallout Role-Playing Game.
 * Great Midwest Commonwealth, appearing in Fallout Tactics and mentioned in Fallout: New Vegas, Van Buren and J.E. Sawyer's Fallout Role-Playing Game.
 * Gulf Commonwealth, appearing in Fallout Tactics 2 and mentioned in J.E. Sawyer's Fallout Role-Playing Game.
 * European Commonwealth, the Fallout world's equivalent of the European Union mentioned in Fallout, Fallout 2, Fallout 3, Fallout Tactics, Van Buren and the Fallout Bible.