|First appearance:||November 29, 1985|
|Last appearance:||February 26, 1993|
Principal Spittle is seen as a middle-aged man who always wears a suit, has balding hair, and wears glasses. He may not fully enjoy his job as hinted in one strip where Calvin and Susie both yelled, "PLEASE DON'T PADDLE US!" while a thought bubble showed him thinking " I hate this job". Moreover, his expression is one of constant boredom in the face of Calvin's antics as Miss Wormwood often sends him to the principal's office.