Bart Cumberdale is a boy who appears in "Bart of Darkness".
When the Simpsons bought a pool, Bart Simpson invited hundreds of children over to swim. Among them was Bart Cumberdale, whom some of the other guests apparently thought was the host, as they addressed him as "Bart". One guest then greeted Marge with "Hello, Mrs. Cumberdale".
- In "Principal Charming", Seymour Skinner says that Bart Simpson is the only Springfield Elementary School student named Bart. It is therefore assumed that Bart Cumberdale either attends a different school or moved to Springfield between this episode and "Bart of Darkness".