The 2023 Grand Prix of Long Beach (formally known as the Acura Grand Prix of Long Beach) was a sports car race held at Long Beach street circuit in Long Beach, California on April 15, 2023. It was the third round of the 2023 IMSA SportsCar Championship and the first round of the 2023 WeatherTech Sprint Cup.
The No. 10 Acura driven by Filipe Albuquerque won the pole position by posting the fastest lap in qualifying and held the lead until a slow pit stop. This handed the lead to Mathieu Jaminet in the No. 6 Porsche who held the first position until 2 laps remaining. Ricky Taylor attempted a pass at turn one, but crashed into the tire barrier and handed Jaminet the victory. The No. 25 BMW of Connor De Phillippi and Nick Yelloly finished in second, and the No. 7 Porsche Penske Motorsport car of Matt Campbell and Felipe Nasr came in third.
Ben Barnicoat and Jack Hawksworth in the No. 14 Vasser Sullivan Racing Lexus were unchallenged throughout the race and took the victory in the Grand Touring Daytona Professional (GTD Pro) class ahead of second-placed No. 3 Corvette Racing drivers Antonio García and Jordan Taylor. The Grand Touring Daytona (GTD) class was won by Bryan Sellers and Madison Snow after they took the lead during the pit stop cycle to secure their second victory of the season, and was followed by the No. 27 Heart of Racing Team car of Roman De Angelis and Marco Sørensen.
The result meant Jaminet and Tandy took over the lead of the GTP Drivers' Championship with 955 points. Matt Campbell and Felipe Nasr moved from sixth to fifth while Pipo Derani and Alexander Sims dropped from first to second. Cadillac remained in the lead of the Manufcatures' Championship, but their advantage was reduced to 41 points as BMW and Porsche jumped one position each. In the GTD Pro Drivers' Championship, Barnicoat and Hawksworth the lead from Jules Gounon and Daniel Juncadella as Lexus took lead of the GTD Pro Manufactures' Championship. Sellers and Snow jumped from second to first in the GTD Drivers' Championship with 1008 points, as BMW took the lead of the GTD Manufactures' Championship with eight races left in the season.