The 15th century is defined by the calendar of Earth as occurring from the year 1400 through the year 1500.
- According to Karr in 2374, the Hirogen way of life of putting all resources into the hunt has not changed "in a thousand years", i.e., since the 15th century. (VOY: "The Killing Game")
- After the Turei render the Vaadwaur homeworld uninhabitable by plasma weapon bombardments, a battalion of approximately six hundred Vaadwaur warriors takes refuge below the planet's surface in a state of cryostasis. Intending to remain in stasis for only five years, they are eventually woken up when USS Voyager visits their planet 892 years later. (VOY: "Dragon's Teeth")
- A rating of "B" on the industrial scale corresponds to a technology level equal to that of Earth in this year. (TOS: "Spock's Brain")
|14th century||Timeline||16th century|