The White Night riots were a series of violent events sparked by an announcement of a lenient sentencing of Dan White for the assassinations of San Francisco Mayor George Moscone and of Harvey Milk, a member of the city's Board of Supervisors who was one of the first openly gay elected officials in the United States. The events took place on the night of May 21, 1979 (the next night would have been Milk's 49th birthday) in San Francisco. Earlier that day, White had been convicted of voluntary manslaughter, the lightest possible conviction for his actions. That White was not convicted of first-degree murder (with which he was originally charged) had so outraged the city's gay community that it set off the most violent reaction by gay Americans since the 1969 Stonewall riots in New York City (which is credited as the beginning of the modern gay rights movement in the United States).

The gay community of San Francisco had a longstanding conflict with the San Francisco Police Department. White's status as a former police officer intensified the community's anger at the SFPD. Initial demonstrations took place as a peaceful march through the Castro district of San Francisco. After the crowd arrived at the San Francisco City Hall, violence began. The events caused hundreds of thousands of dollars worth of property damage to City Hall and the surrounding area, as well as injuries to police officers and rioters.

Several hours after the riot had been broken up, police made a retaliatory raid on a gay bar in San Francisco's Castro District. Many patrons were beaten by police in riot gear. Two dozen arrests were made during the course of the raid, and several people later sued the SFPD.In the following days, gay leaders refused to apologize for the events of that night. This led to increased political power in the gay community, which culminated in the election of Mayor Dianne Feinstein to a full term the following November. In response to a campaign promise, Feinstein appointed a pro-gay Chief of Police, which increased recruitment of gay people in the police force and eased tensions.