14 states have more than one time zone[0].

I live in South Dakota, which is one of them—the Mountain/Central timezone boundary within the state follows the Missouri river. (Locals refer to "East River" and "West River" to refer to the two halves of the state. The capital, Pierre, is technically East River, but is right on the banks, almost dead-center.)

[0]: https://simple.wikipedia.org/wiki/List_of_U.S._states_and_te...