FALSE. Patently false.
From 1938 through 1978, there was absolutely NO mention of Kansas anywhere within the Superman mythos.
That relocation to Kansas was an eventual result of SUPERMAN: THE MOVIE in December 1978. But, in the comics, that change to Kansas still didn't happen until 1986 with the John Byrne reboot MAN OF STEEL miniseries.
So, to recap, there was no "Kansas Smallville" in the Superman comics from 1938 - 1986, a full 48 years out of the character's 76 year history.
Meh. Smallville was fine for the first 48 years without being in Kansas. Smallville has not been in Kansas for the majority (63% of the time) of the character's existence. It was much more inclusive (and consistent with the other two fictional Super-places of Krypton and Metropolis) that way.And rants about most states having a smallville are irrelevant. The Smallville is in Kansas. In the comics. Even on the show Smallville.
That's a question you should be asking yourself.Why ignore 70 years of history.