A continuación, la lista de pilotos inscritos para la STP 300:
| No. | Piloto | Sponsor | Propietario | Marca |
|---|---|---|---|---|
| 00 | Ken Butler III | JW Demolition | Melissa Sciavicco | Toyota |
| 01 | Mike Wallace | JD Motorsports | Johhny Davis | Chevrolet |
| 2 | Brian Scott | Fast Fixin | Richard Childress | Chevrolet |
| 3 | Austin Dillon | AdvoCare | Richard Childress | Chevrolet |
| 4 | Landon Cassill | Flex Seal | Gene Vess | Chevrolet |
| 5 | Brad Sweet | Great Clips | Rick Hendrick | Chevrolet |
| 6 | Trevor Bayne | Ford EcoBoost | Jack Roush | Ford |
| 7 | Regan Smith | speedco | Kelly Earnhardt-Miller | Chevrolet |
| 10 | Jeff Green | TriStar Motorsports | Mark Smith | Toyota |
| 11 | Elliott Sadler | OneMain Financial | J.D. Gibbs | Toyota |
| 12 | Sam Hornish Jr. | Alliance Truck Parts | Roger Penske | Ford |
| 14 | Eric McClure | Hefty/Reynolds | Mark Smith | Toyota |
| 15 | Carl Long | RWR | Rick Ware | Ford |
| 17 | Tanner Berryhill | Keller Williams Realty | Adrian Berryhill | Toyota |
| 19 | Mike Bliss | TriStar Motorsports | Mark Smith | Toyota |
| 20 | Brian Vickers | Dollar General | Joe Gibbs | Toyota |
| 21 | Dakoda Armstrong | Winfield | Richard Childress | Chevrolet |
| 22 | Joey Logano | Hertz | Roger Penske | Ford |
| 23 | Harrison Rhodes | RWR | Robert Richardson Sr. | Ford |
| 24 | Blake Koch | Compassion International | Jason Siavicco | Toyota |
| 30 | Nelson Piquet Jr. | Worx | Harry Scott Jr. | Chevrolet |
| 31 | Justin Allgaier | Brandt | Steve Turner | Chevrolet |
| 32 | Kyle Larson | International | Harry Scott Jr. | Chevrolet |
| 33 | Matt Crafton | Rheem/Menards | Richard Childress | Chevrolet |
| 37 | Matt DiBenedetto | NationalCashLenders.com | Tina Berryhill | Dodge |
| 40 | Reed Sorenson | E-Swisher.com | Curtis Key Sr. | Chevrolet |
| 42 | Josh Wise | Curtis Key Plumbing | Curtis Key Sr | Chevrolet |
| 43 | Michael Annett | STP | Richard Petty | Ford |
| 44 | Chad Hackenbracht | Tastee Apple Inc. | Mark Smith | Toyota |
| 46 | JJ Yeley | Curtis Key Plumbing | Curtis Key Sr | Chevrolet |
| 51 | Jeremy Clements | US Petroleum Consultants | Tony Clements | Chevrolet |
| 52 | Joey Gase | TBA | Jimmy Means | Chevrolet |
| 54 | Joey Coulter | Monster Energy | JD Gibbs | Toyota |
| 60 | Travis Pastrana | Valvoline NextGen | Jack Roush | Ford |
| 70 | Johanna Long | Foretravel | Mary Louise Miller | Chevrolet |
| 74 | Juan Carlos Blum | Oleofino's | Mike Harmon | Chevrolet |
| 77 | Parker Kligerman | Toyota | Kyle Busch | Toyota |
| 79 | Kyle Fowler | TBA | Archie St. Hilaire | Ford |
| 87 | Joe Nemechek | NEMCO Motorsports | Andrea Nemechek | Toyota |
| 89 | Morgan Shepherd | Malamphy Electric | Morgan Shepherd | Chevrolet |
| 92 | Dexter Stacey | Maddie's Place | Kristin Hamelin | Ford |
| 99 | Alex Bowman | TBA | Robby Benton | Toyota |
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