| Type: | CUST |
| Most Laps: | 90 |
| Announcers: | Rick Allen, Jeff Burton, Brad Daugherty |
| Pole Team: | Team Penske |
| Grid From Prev Perf: | yes |
| Pole Driver: | Austin Cindric |
| Network: | NBCSN |
| First Driver: | Josh Berry |
| First Team: | JR Motorsports |
| Most Team: | JR Motorsports |
| Most Driver: | Justin Allgaier |
| Course Km: | 2.4 |
| Course Mi: | 1.5 |
| Car: | 1 |
| Location: | North Las Vegas, Nevada, Las Vegas Motor Speedway |
| Official Name: | Alsco Uniforms 302 |
| Avg: | 123.509mph |
| Description: | Race 27 of 33 of the 2021 NASCAR Xfinity Series |
| Race Name: | Alsco Uniforms 302 |
| Year: | 2021 |
| Date: | September 25 |
| Scheduled Laps: | 201 |
| Distance Laps: | 201 |
| Scheduled Mi: | 301.5 |
| Distance Km: | 485.214 |
| Scheduled Km: | 485.214 |
| Distance Mi: | 301.5 |
| Radio: | Performance Racing Network |
The 2021 Alsco Uniforms 302 was the 27th stock car race of the 2021 NASCAR Xfinity Series, the 4th iteration of the event, and the first race of the playoffs and the Round of 12. The race was held on Saturday, September 25, 2021, in North Las Vegas, Nevada at Las Vegas Motor Speedway, a 1.5miles permanent D-shaped oval racetrack. The race took 201 laps to complete. Josh Berry, in a dominating finish where his team, JR Motorsports finished 1–2–3, won the race after almost being involved in a wreck early in the race.[1] Justin Allgaier and Noah Gragson would fill in the rest of the podium positions, finishing second and third, respectively.
Las Vegas Motor Speedway, located in Clark County, Nevada outside the Las Vegas city limits and about 15 miles northeast of the Las Vegas Strip, is a 1,200-acre (490 ha) complex of multiple tracks for motorsports racing. The complex is owned by Speedway Motorsports, Inc., which is headquartered in Charlotte, North Carolina.
Qualifying was determined by a qualifying metric system based on the last race, the 2021 Food City 300 and owner's points. As a result, Austin Cindric of Team Penske won the pole.[3]
In driver introductions, Matt Jaskol, Las Vegas native who was starting 34th would skydive out of a helicopter onto the track.[4]
Stage 1 Laps: 45