Izar IV was a planet located somewhere in the space of the galaxy's Alpha Quadrant, the fourth planet in orbit of the Izar star system. By the late 24th century, Izar IV was a holding of the Romulan Star Empire, and was considered a friendly port of call by the Romulan Imperial Fleet. (ST video game: Starfleet Command III)
- In gameplay, this name was part of a list that were applied to planets on the game map, with random attributes assigned to them. Most other Star Trek sources show Izar as being in Federation space, despite this planet of Izar's system apparently harboring Romulans.