2018 Townsville 400
The 2018 Townsville 400 was a motor racing event for the Supercars Championship, held on the weekend of 6-8 July 2018. The event was held at Townsville Street Circuit near Townsville, Queensland and consisted of two races, both 200 kilometres in length. It was the eighth event of sixteen in the 2018 Supercars Championship and hosted Races 17 and 18 of the season.
Results
Practice
Race 17
Qualifying
Race
;Notes- – Garth Tander received a 15-second post-race Time Penalty for Careless Driving, causing an incident along with James Courtney, Chaz Mostert and Anton de Pasquale.
Championship standings after Race 17
| Driver | Gap | |||
| 1 |  Scott McLaughlin | 1904 | ||
| 2 | Shane van Gisbergen | 1752 | -152 | |
| 3 |  David Reynolds | 1544 | -360 | |
| 1 | 4 | Jamie Whincup | 1492 | -412 |
| 1 | 5 | Craig Lowndes | 1482 | -422 |
;Teams Championship
| Team | Gap | |||
| 1 | DJR Team Penske | 3244 | ||
| 2 | Triple Eight Race Engineering | 3244 | -0 | |
| 3 | Walkinshaw Andretti United | 2500 | -744 | |
| 4 | Erebus Motorsport | 2344 | -900 | |
| 5 | Brad Jones Racing | 2325 | -919 |
- Note: Only the top five positions are included for both sets of standings.
Race 18
Qualifying
;Notes- – Anton de Pasquale, for causing a Red Flag, had his best lap-time deleted and not permitted to take any further part in qualifying.
Top 10 Shootout
Race
;Notes- – Jack Le Brocq received a 15-second post-race Time Penalty for Careless Driving, causing contact with Will Davison.
Championship standings after Race 18
| Driver | Gap | |||
| 1 | Scott McLaughlin | 2033 | ||
| 2 | Shane van Gisbergen | 1902 | -131 | |
| 3 | David Reynolds | 1646 | -387 | |
| 4 | Jamie Whincup | 1630 | -403 | |
| 5 | Craig Lowndes | 1602 | -431 |
;Teams Championship
| Team | Gap | |||
| 1 | 1 | Triple Eight Race Engineering | 3532 | |
| 1 | 2 | DJR Team Penske | 3463 | -69 |
| 3 | Walkinshaw Andretti United | 2620 | -912 | |
| 4 | Erebus Motorsport | 2500 | -1032 | |
| 1 | 5 | Tickford Racing | 2458 | -1074 |
- Note: Only the top five positions are included for both sets of standings.