| 2013-02-02 | UFC 156: Aldo vs. Edgar | Welterweight | Demian Maia def. Jon Fitch | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2012-10-13 | UFC 153: Silva vs. Bonnar | Welterweight | Jon Fitch def. Erick Silva | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2011-12-30 | UFC 141: Lesnar vs. Overeem | Welterweight | Johny Hendricks def. Jon Fitch | KO (punch) | 1 | 0:12 |
| 2011-02-27 | UFC 127: Penn vs. Fitch | Welterweight | B.J. Penn vs. Jon Fitch | Draw (majority) (28–29, 28–28, 28–28) | 3 | 5:00 |
| 2010-08-07 | UFC 117: Silva vs. Sonnen | Catchweight | Jon Fitch def. Thiago Alves | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2010-03-27 | UFC 111: St-Pierre vs. Hardy | Welterweight | Jon Fitch def. Ben Saunders | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2009-12-12 | UFC 107: Penn vs. Sanchez | Welterweight | Jon Fitch def. Mike Pierce | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2009-07-11 | UFC 100 | Welterweight | Jon Fitch def. Paulo Thiago | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2009-01-31 | UFC 94: St-Pierre vs. Penn 2 | Welterweight | Jon Fitch def. Akihiro Gono | Decision (unanimous) (30–27, 30–27, 30–26) | 3 | 5:00 |
| 2008-08-09 | UFC 87: Seek and Destroy | Welterweight | Georges St-Pierre def. Jon Fitch title | Decision (unanimous) (50–43, 50–44, 50–44) | 5 | 5:00 |
| 2008-03-01 | UFC 82: Pride of a Champion | Welterweight | Jon Fitch def. Chris Wilson | Decision (unanimous) (30–27, 29–28, 30–27) | 3 | 5:00 |
| 2007-09-22 | UFC 76: Knockout | Welterweight | Jon Fitch def. Diego Sanchez | Decision (split) (30–27, 28–29, 29–28) | 3 | 5:00 |
| 2007-06-12 | UFC Fight Night: Stout vs. Fisher | Welterweight | Jon Fitch def. Roan Carneiro | Submission (rear-naked choke) | 2 | 1:07 |
| 2007-03-03 | UFC 68: The Uprising | Welterweight | Jon Fitch def. Luigi Fioravanti | Submission (rear-naked choke) | 2 | 3:05 |
| 2006-10-14 | UFC 64: Unstoppable | Welterweight | Jon Fitch def. Kuniyoshi Hironaka | Decision (unanimous) (30–25, 30–27, 30–27) | 3 | 5:00 |
| 2006-06-28 | UFC Ultimate Fight Night 5 | Welterweight | Jon Fitch def. Thiago Alves | TKO (upkick and punches) | 2 | 4:37 |
| 2006-04-06 | UFC Ultimate Fight Night 4 | Welterweight | Jon Fitch def. Josh Burkman | Submission (rear-naked choke) | 2 | 4:57 |
| 2005-10-03 | UFC Ultimate Fight Night 2 | Middleweight | Jon Fitch def. Brock Larson | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |