- 2021 Alsco Uniforms 300 Results Stock Car Online Results Reference
- 2021 Alsco Uniforms 300 Results Stock Car Online Results Reference
| fin | qual | driver | team | laps led | car | sponsor | pts | laps | status |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 10 | AJ Allmendinger | Kaulig Racing | 44 | #16 Chevy Impala | Ellsworth Advisors | 56 | 200 | Finish |
| 2 | 3 | Daniel Hemric | Joe Gibbs Racing | 74 | #18 Toyota Supra | Poppy Bank | 53 | 200 | Finish |
| 3 | 4 | Brandon Jones | Joe Gibbs Racing | 28 | #19 Toyota Supra | Menards / Turtle Wax | 47 | 200 | Finish |
| 4 | 2 | Austin Cindric | Team Penske | 43 | #22 Ford Fusion | Carquest Auto Parts | 44 | 200 | Finish |
| 5 | 34 | Noah Gragson | JR Motorsports | 0 | #9 Chevy Impala | Bass Pro Shops TrueTimber BRCC | 39 | 200 | Finish |
| 6 | 13 | Michael Annett | JR Motorsports | 0 | #1 Chevy Impala | Pilot Flying J | 41 | 200 | Finish |
| 7 | 9 | Josh Berry | JR Motorsports | 0 | #8 Chevy Impala | FilterTime | 30 | 200 | Finish |
| 8 | 6 | Justin Haley | Kaulig Racing | 5 | #11 Chevy Impala | LeafFilter Gutter Protection | 38 | 200 | Finish |
| 9 | 22 | Harrison Burton | Joe Gibbs Racing | 0 | #20 Toyota Supra | DEX Imaging | 31 | 200 | Finish |
| 10 | 5 | Jeb Burton | Kaulig Racing | 0 | #10 Chevy Impala | Alsco Uniforms | 27 | 200 | Finish |
| 11 | 25 | Brandon Brown | Brandonbilt Motorsports | 0 | #68 Chevy Impala | GreenTech Energy | 28 | 200 | Finish |
| 12 | 40 | Tyler Reddick | Our Motorsports | 0 | #23 Chevy Impala | Quartz Hill Records | 0 | 200 | Finish |
| 13 | 23 | Santino Ferrucci | Sam Hunt Racing | 0 | #26 Toyota Supra | TBD | 24 | 200 | Finish |
| 14 | 37 | Justin Allgaier | JR Motorsports | 4 | #7 Chevy Impala | BRANDT Professional Agriculture | 35 | 200 | Finish |
| 15 | 21 | Tommy Joe Martins | Martins Motorsports | 0 | #44 Chevy Impala | Discover Denton Texas | 22 | 200 | Finish |
| 16 | 24 | Josh Williams | DGM Racing | 0 | #92 Chevy Impala | Silverton Casino & Hotel | 21 | 200 | Finish |
| 17 | 8 | Jeremy Clements | Jeremy Clements Racing | 0 | #51 Chevy Impala | First Pacific Funding | 20 | 199 | Finish |
| 18 | 26 | Joe Graf Jr | SS GreenLight Racing | 0 | #07 Chevy Impala | Bucked Up Energy | 19 | 199 | Finish |
| 19 | 30 | Jeffrey Earnhardt | JD Motorsports | 0 | #0 Chevy Impala | KSDT CPA | 18 | 199 | Finish |
| 20 | 38 | Colby Howard | JD Motorsports | 0 | #15 Chevy Impala | Project HOPE Foundation | 17 | 199 | Finish |
| 21 | 14 | Landon Cassill | JD Motorsports | 0 | #4 Chevy Impala | teamjdmotorsports.com | 16 | 199 | Finish |
| 22 | 39 | Bayley Currey | Mike Harmon Racing | 0 | #74 Chevy Impala | Lerner & Rowe | 15 | 199 | Finish |
| 23 | 35 | Ryan Vargas | JD Motorsports | 0 | #6 Chevy Impala | KSDT CPA | 14 | 199 | Finish |
| 24 | 15 | Garrett Smithley | SS GreenLight Racing | 0 | #17 Chevy Impala | Trophy Tractor | 13 | 199 | Finish |
| 25 | 16 | Dexter Bean | DGM Racing | 0 | #90 Chevy Impala | Badger Environmental | 12 | 198 | Finish |
| 26 | 32 | Jesse Little | B.J. McLeod Motorsports | 0 | #78 Toyota Supra | SKUTTLE TIGHT | 11 | 198 | Finish |
| 27 | 36 | Gray Gaulding | Means Motorsports | 0 | #52 Chevy Impala | SVS Vision | 10 | 198 | Finish |
| 28 | 29 | Chad Finchum | Hattori Racing Enterprises | 0 | #61 Toyota Supra | LasVegas.net | 9 | 198 | Finish |
| 29 | 28 | David Starr | Motorsports Business Management | 0 | #13 Ford Fusion | TBD | 8 | 198 | Finish |
| 30 | 27 | Jade Buford | Big Machine Racing | 0 | #48 Chevy Impala | Big Machine Spiked Coolers | 7 | 196 | Finish |
| 31 | 20 | Ty Dillon | Joe Gibbs Racing | 2 | #54 Toyota Supra | Toyota Service Centers/Mobil 1 | 7 | 195 | Finish |
| 32 | 1 | Myatt Snider | Richard Childress Racing | 0 | #2 Chevy Impala | TaxSlayer | 5 | 191 | Finish |
| 33 | 19 | Kyle Weatherman | MHR w/Gary Keller | 0 | #47 Chevy Impala | PORAC | 4 | 184 | Finish |
| 34 | 7 | Brett Moffitt | Our Motorsports | 0 | #02 Chevy Impala | TBD | 0 | 181 | Accident |
| 35 | 17 | Alex Labbe | DGM Racing | 0 | #36 Chevy Impala | Prolon / rousseau /Silver Wax | 2 | 181 | Accident |
| 36 | 33 | Stefan Parsons | B.J. McLeod Motorsports | 0 | #99 Toyota Supra | Springrates | 1 | 137 | Fuel Line |
| 37 | 18 | Timmy Hill | Motorsports Business Management | 0 | #66 Toyota Supra | CRASHCLAIMSR.US | 1 | 100 | Engine |
| 38 | 11 | Ryan Sieg | RSS Racing | 0 | #39 Ford Fusion | CMRroofing.com | 1 | 73 | Accident |
| 39 | 31 | Matt Mills | B.J. McLeod Motorsports | 0 | #5 Chevy Impala | J.F. Electric | 1 | 72 | Electrical |
| 40 | 12 | Riley Herbst | Stewart-Haas Racing | 0 | #98 Ford Fusion | South Point | 3 | 56 | Accident |