The Epsilon IX station was a Federation Regula type starbase in service to Starfleet in the 24th century. It was named after the 2270s Starfleet station Epsilon IX.

In the year 2365, the USS Enterprise-D was to visit the station before joining an expedition to the Epsilon Pulsar Cluster. In 2369, its 24th century replacement was named in the personal log of Lieutenant Keith Rocha, a network relay tech on Relay Station 47. The relevant log entry transcribed on stardate 45460 was: "More heavy traffic to the Epsilon IX station. I think Starfleet's got some big science project brewing there with at least half a dozen starships running around."