What provinces have been used so far in the elder scrolls

The Elder Scrolls games take place in the continent of Tamriel, which consists of nine provinces - Cyrodiil, High Rock, Skyrim, Valenwood, Summerset Isle, Skyrim, Hammerfell, Black Marsh and Elsweyr.

Arena took place over the whole continent of Tamriel. Daggerfall took place in Hammerfell and High Rock. Morrowind took place in Morrowind, though only the island of Vvardenfell and not mainland Morrowind (though you visit Mournhold in the Tribunal expansion). Oblivion took place in Cyrodiil, and Skyrim takes place in Skyrim.