EF Core's main components are: 1. DbContext: Represents a session with the database. 2. Entities: Classes representing data stored in the database. 3. DbSet: Property on DbContext representing a collection of entities. 4. LINQ provider: Translates LINQ queries into SQL queries. 5. Migrations: Manage changes to the database schema. 6. Change Tracking: Tracks changes made to entities. 7. Querying: Supports LINQ queries, raw SQL queries, and stored procedures. 8. Database Providers: Supports multiple database systems. 9. Configuration: Allows customization of EF Core's behavior.