Regan Smith NASCAR Xfinity Series results at Fontana
| Year | Race # | Start | Finish | Car # | Sponsor | Engine | Owner | Crew Chief | Qualifying Speed | Laps | X Led | Laps Led | Status | Money | Points |
| 2003 | 9 | 33 | 36 | 22 | Colorfast Industries | Chevrolet | | | 177.327 | 94 | 0 | 0 | running | 19900 | 55 |
| 2005 | 27 | 35 | 19 | 58 | Samson Stone | Dodge | | | 177.000 | 149 | 0 | 0 | running | 23475 | 106 |
| 2006 | 2 | 24 | 28 | 35 | McDonald's | Ford | | | 178.470 | 148 | 0 | 0 | running | 27645 | 79 |
| 2006 | 27 | 31 | 28 | 35 | McDonald's McGriddles | Ford | | | 173.185 | 149 | 0 | 0 | running | 26025 | 79 |
| 2007 | 2 | 22 | 9 | 4 | Ginn Resorts | Chevrolet | | | 176.774 | 150 | 0 | 0 | running | 40080 | 138 |
| 2013 | 5 | 16 | 3 | 7 | TaxSlayer.com | Chevrolet | | | 174.562 | 150 | 0 | 0 | running | 50825 | 41 |
| 2014 | 5 | 11 | 10 | 7 | Best Foods | Chevrolet | | | 175.756 | 150 | 0 | 0 | running | 28081 | 34 |
| 2015 | 5 | 5 | 9 | 7 | Suave Men | Chevrolet | | | 177.130 | 150 | 1 | 4 | running | 30589 | 36 |
