Rubber duck is a stylized duck shaped toy, usually yellow and flat on the bottom. It can be made of rubber or something like vinyl rubber. The yellow rubber duck has acquired the symbolic status in the western popular culture, and usually has the symbolic significance with the bath.

The history of rubber duck is closely related to the rise of rubber manufacturing in the late 19th century. The earliest rubber ducks were made of harder rubber that manufacturers began to use Charles Goodyear's vulcanized rubber. Therefore, these solid rubber ducks can not float, but are used as chewing toys.

Sculptor Peter ganine created the duck sculpture in the 1940s. He then patented it and copied it as a floating toy, which has sold more than 50 million.

In addition to the ubiquitous yellow rubber duck that most people are familiar with, there are many novel variations on the basic theme, including the duck, who represents a career, political figure or celebrity. There are also ducks that glow in the dark, rattle, change colors, have internal LED lighting or include a wind engine that makes them "swim.". In 2001, the British tabloid The Sun reported that Queen Elizabeth II had placed a rubber duck in her bathroom with an inflatable crown on her head. The duck was found by the worker who was repainting her bathroom. The story has boosted sales of rubber ducks in the UK by 80% in a short period of time.

Rubber ducks are collected by lovers. The 2007 Guinness world record is the world's largest collection of rubber ducks, with 1439 rubber ducks awarded Charlotte Lee. In 2013, rubber duck was introduced into the toy Hall of fame of Rochester Museum in New York along with the chess match. Toys are selected according to icon status, life span and innovation.