Thirty-six people died when a fire broke out at an illegally converted warehouse in Oakland, California, the deadliest U.S. building fire since 2003.

On December 2, 2016, at about 11:20 p.m. PST, a fire started in a former warehouse that had been unlawfully converted into an artist collective with living spaces in Oakland, California, which was hosting a concert with 80–100 attendees. The building, located in the Fruitvale neighborhood, was zoned for only industrial purposes; residential and entertainment uses were prohibited. The blaze killed 36 people, making it the deadliest fire in the history of Oakland. It was also the deadliest building fire in the United States since The Station nightclub fire in 2003, the deadliest in California since the 1906 San Francisco earthquake and the deadliest mass-casualty event in Oakland since the 1989 Loma Prieta earthquake.

Oakland is a city in the East Bay region of the San Francisco Bay Area in the U.S. state of California. It is the county seat of and the most populous city in Alameda County, with a population of 440,646 in 2020. A major West Coast port, Oakland is the most populous city in the East Bay, the third most populous city in the Bay Area, and the eighth most populous city in California. It serves as the Bay Area's trade center: the Port of Oakland is the busiest port in Northern California, and the fifth- or sixth-busiest in the United States. A charter city, Oakland was incorporated on May 4, 1852, in the wake of the state's increasing population due to the California gold rush.