The 2017 IMSA SportsCar Championship (known for sponsorship reasons as the 2017 IMSA WeatherTech SportsCar Championship) was the 47th season of the International Motor Sports Association (IMSA) GT Championship that traces its lineage to the 1971 IMSA GT Championship. It was the fourth season of the United SportsCar Championship and second under the name as the IMSA SportsCar Championship. It began on 28 January with the 24 Hours of Daytona, and ended on 7 October with the Petit Le Mans.

The class structure remained largely unchanged from 2016, with the major change coming in Daytona Prototype international (DPi) which replaced Daytona Prototype (DP) machinery.

The 2017 schedule was released on 5 August 2016 and features twelve rounds.

The first 3 hours of the 24 Hours of Daytona and Long Beach were broadcast on Fox. The other rounds were all broadcast on Fox Sports 1, Fox Sports 2, and Fox Sports GO.

The Prototype class is made up of LMP2 cars both in LMP2 trim, with the ACO specification Gibson V8 engine, and in Daytona Prototype international (DPi) trim, where manufacturers are allowed to alter certain body panels designed to reflect the automaker's design language, and run their own engines. Mazda (Riley Technologies), Cadillac (Dallara), and Nissan (Onroak Automotive) run chassis from the respective constructors featuring manufacturer-specific bodywork.

All entries use an Oreca FLM09 chassis powered by a LS3 6.2 L V8 engine.

Bold indicates overall winner.

Championship points are awarded in each class at the finish of each event. Points are awarded based on finishing positions as shown in the chart below.