The 2024 NASCAR Xfinity Series was the 43rd season of the NASCAR Xfinity Series, a stock car racing series sanctioned by NASCAR in the United States. The season started on February 19 with the United Rentals 300 at Daytona International Speedway and ended with the NASCAR Xfinity Series Championship Race on November 9 at Phoenix Raceway.
Cole Custer of Stewart–Haas Racing entered the season as the defending NASCAR Xfinity Series champion.[1][2] Following the 2024 Food City 300 at Bristol Motor Speedway, Custer won the regular season championship. At season's end, Justin Allgaier of JR Motorsports became the 2024 Xfinity Series champion.