King Daniel wrote:
Here's some annoying fanon: "Kirk was born in Iowa."
That from the original Star Trek (TOS) writer's guide, the shows "bible."
That Kirk is from Iowa is repeated in the 1968 book The Making of Star Trek.
It's mentioned in TMoST, Chapter 4, page 215, of the 13th printing from 1974 (1968 edition).
However, I can't find it mentioned in the Star Trek Writers/Directors Guide
, third revision from April 17, 1967.
Can you provide a citation in the writer's guide?