Onion rings are a type of fast food commonly found in the United States, Canada, United Kingdom, Australia, Malaysia and other places. It generally consists of a small ring of onion dipped in batter and then deep fried. The ring-like structure of an onion lends itself well to this mode of preparation.

The exact origin of the onion ring is unknown, but in 1933 a recipe for deep-fried onion rings that are dipped in milk then dredged in flour appeared in a Crisco advertisement in The New York Times Magazine.