Oolids hailed from the planet Oolidi and maintained an association with the New Republic. Their representative in the senate was Tolik Yar.
The Oolid species was conceived by Author Michael P. Kube-McDowell for his book Before the Storm, which was released by Bantam Spectra in 1996. The Oolid senator also appeared in its follow-up, Shield of Lies. Subsequently, in 2000, James Luceno brought the senator back in The New Jedi Order: Agents of Chaos I: Hero's Trial, which was published by Del Rey.