The farming state in North America that James T. Kirk calls home, containing the town of Riverside and, in the Kelvin timeline, the shipyard where the Enterprise is built.
Iowa is a region of North America on Earth, best known as the home of James T. Kirk. In Star Trek IV: The Voyage Home, when Gillian Taylor suspects he comes from outer space, Kirk replies that he is from Iowa and only works there.
The 2009 film Star Trek shows the state in the alternate reality: the young Kirk drives his stepfather's antique car across its flat farmland and over the edge of a quarry, and grows up into a restless young man who brawls with cadets in a bar. Christopher Pike challenges him to enlist, and Kirk rides to the Riverside Shipyard, where the Enterprise is taking shape in the fields, to board the recruits' shuttle.
In the Strange New Worlds episode Tomorrow and Tomorrow and Tomorrow, a Kirk from an altered timeline remarks that he was born in space, in contrast to the Iowa upbringing of the man La'an later meets.