UFC 231: Holloway vs. Ortega
- Cast: Max Holloway, Brian Ortega, Valentina Shevchenko, Joanna Jędrzejczyk, Gunnar Nelson
- Duration: N/A minutes
- Genre: Action
- Rating: 7.4/10
- Release Date: 2018-12-08
UFC 231: Holloway vs. Ortega was a mixed martial arts event produced by the Ultimate Fighting Championship held on December 8, 2018 at Scotiabank Arena in Toronto, Ontario, Canada. A UFC Featherweight Championship bout between Max Holloway and Brian Ortega served as the event headliner.
