Yes, Since John Henry eden said, Every president from George washington to Richardson.
Well, according to the http://fallout.wikia.com/wiki/Divergence article on the wiki, the Fallout world likely diverged* from ours somewhere between 1947 and 1955.
Ergo, until 1955 at the latest the presidents would be the same as in our world but after that it probably took a different direction, which means that Ronald Reagan likely never became president of the US in the Fallout universe.
*The wiki says that the point of divergence is speculative. It is a fact that it
did diverge but the precise point it did so remains unconfirmed, hence the relatively large span of years; '47 - '55.