The Epsilon IX sector, also known as the Epsilon Sector, was a region of space. The Epsilon Pulsar Cluster was located in this sector.

In 2365, the USS Enterprise-D was assigned to perform an astronomical survey of the Epsilon Pulsar Cluster. (TNG: "Samaritan Snare")

According to Star Trek Encyclopedia (4th ed., vol. 1, p. 249), this may have been the location of the Epsilon IX station from Star Trek: The Motion Picture.