St. Petersburg GP Starting Lineup
Official starting lineup and tire choice for all 24 drivers
| Pos | Car | Driver Name | Engine | Tire |
| 1 | 12 | Power, Will | Chevy | Alternate |
| 2 | 2 | Newgarden, Josef | Chevy | Alternate |
| 3 | 10 | Rosenqvist, Felix (R) | Honda | Alternate |
| 4 | 9 | Dixon, Scott | Honda | Alternate |
| 5 | 28 | Hunter-Reay, Ryan | Honda | Alternate |
| 6 | 27 | Rossi, Alexander | Honda | Alternate |
| 7 | 60 | Harvey, Jack | Honda | Alternate |
| 8 | 23 | Kimball, Charlie | Chevy | Alternate |
| 9 | 5 | Hinchcliffe, James | Honda | Alternate |
| 10 | 15 | Rahal, Graham | Honda | Alternate |
| 11 | 88 | Herta, Colton (R) | Honda | Alternate |
| 12 | 81 | Hanley, Ben (R) | Chevy | Alternate |
| 13 | 22 | Pagenaud, Simon | Chevy | Alternate |
| 14 | 26 | Veach, Zach | Honda | Alternate |
| 15 | 20 | Jones, Ed | Chevy | Alternate |
| 16 | 21 | Pigot, Spencer | Chevy | Alternate |
| 17 | 98 | Andretti, Marco | Honda | Alternate |
| 18 | 7 | Ericsson, Marcus (R) | Honda | Alternate |
| 19 | 18 | Bourdais, Sebastien | Honda | Alternate |
| 20 | 30 | Sato, Takuma | Honda | Alternate |
| 21 | 14 | Kanaan, Tony | Chevy | Alternate |
| 22 | 4 | Leist, Matheus | Chevy | Alternate |
| 23 | 19 | Ferrucci, Santino (R) | Honda | Alternate |
| 24 | 59 | Chilton, Max | Chevy | Alternate |