| # | Event | Length | Classes | Circuit | Date | |
|---|---|---|---|---|---|---|
| 1 |  | Rolex 24 at Daytona | 24 hours | All | Daytona International Speedway | January 28 - 29 |
| 2 | | Mobil 1 Twelve Hours of Sebring | 12 hours | All | Sebring International Speedway | March 18 |
| 3 | | Grand Prix of Long Beach | 1 hour, 40 minutes | GTP, GTD Pro, GTD | Long Beach Street Circuit | April 15 |
| 4 | | Motul Course de Monterey | 2 hours, 40 minutes | GTP, LMP2, GTD Pro, GTD | WeatherTech Raceway Laguna Seca | May 14 |
| 5 | | Sahlen's Six Hours of the Glen | 6 hours | All | Watkins Glen International | June 25 |
| 6 |  | Chevrolet Grand Prix | 2 hours, 40 minutes | GTP, LMP3, GTD Pro, GTD | Canadian Tire Motorsport Park | July 09 |
| 7 | | Northeast Grand Prix | 2 hours, 40 minutes | GTD Pro, GTD | Lime Rock Park | July 22 |
| 8 | | IMSA Sportscar Weekend | 2 hours, 40 minutes | All | Road America | August 06 |
| 9 | | Michelin GT Challenge at VIR | 2 hours, 40 minutes | GTD Pro, GTD | Virginia International Raceway | August 27 |
| 10 | | IMSA Battle on the Bricks | 2 hours, 40 minutes | All | Indianapolis Motor Speedway | September 17 |
| 11 | | Motul Petit Le Mans | 10 hours | All | Michelin Raceway Road Atlanta | October 14 |
2023 IMSA Calendar
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