Board Thread:Lore Discussion/@comment-178.84.10.91-20150923153825/@comment-32666991-20170808114313

It could be the Argonians. They're native to Tamriel unlike the other races, and their development is tied with the Hist so really the Hist probably are the oldest race that are still around.Other very old races though as others have said are the mer who came before men, the Dwemer and Snow Elves probably came from Aldmeris (if Aldmeris even exsisted), before the rest of the aldmer came to mainland tamriel. The Khajiit actually were a tribe of elves (probably bosmer) who where changed by Azura. So that would mean the bosmer (or atleast their aldmeri ancestors) would have been present on Tamriel for a long time.

I hope this helps