The rainbow flag, also known as the (gay) pride flag, is a symbol of lesbian, gay, bisexual, and transgender (LGBT) pride and LGBT social movements. The colors reflect the diversity of the LGBT community and the spectrum of human sexuality and gender. Using a rainbow flag as a symbol of gay pride began in San Francisco, California, but eventually became common at LGBT rights events worldwide.

Originally devised by artist Gilbert Baker, Lynn Segerblom, James McNamara and other activists,[4][5][6][7] the design underwent several revisions after its debut in 1978, and continues to inspire variations. Although Baker's original rainbow flag had eight colors,[8][9] from 1979 to the present day the most common variant consists of six stripes: red, orange, yellow, green, blue, and violet. The flag is typically displayed horizontally, with the red stripe on top, as it would be in a natural rainbow.

LGBT people and allies currently use rainbow flags and many rainbow-themed items and color schemes as an outward symbol of their identity or support. In addition to the rainbow, many other flags and symbols are used to communicate specific identities within the LGBT community.