A bikini contest is a competition where women compete against each other in bikinis.

Bikini contests can take place in bars, nightclubs, at beaches, and beauty pageants. Bikini contests can also take place over the internet by women submitting pictures of themselves in bikinis.

Women often wear sashes indicating where they are from in bikini contests, in similarity to the tradition in other beauty pageants.

It is becoming more and more common for women to wear bikinis as part of the swimsuit competitions at major pageants. Participants in the Miss Teen USA pageant are required to wear bikinis.

The name "bikini contest" may be misleading in that the contestants are not actually contesting the bikini itself. Rather, the competition revolves around a subjective assessment of the physical attractiveness of the participants, which may or may not involve the actual bikinis they wear and/or remove during the "competition."