A Polish joke is an English-language ethnic joke deriding Polish people, based on derogatory stereotypes. The Polish joke belongs in the category of conditional jokes, whose full understanding requires the audience to have prior knowledge of what a Polish joke is. As with all discriminatory jokes, Polish jokes depend on the listener's preconceived notions and antipathies.
The relation between the internalized derogatory stereotypes about Polish people, and the persistence of ethnic jokes about them, is not easy to trace, though the jokes seem to be understood by many who hear them. Sometimes an offensive term for a Pole, such as Polack, is used in the joke.