The Omaha Race Riot occurred in Omaha, Nebraska, September 28–29, 1919. The race riot resulted in the lynching of Will Brown, a black civilian; the death of two white rioters; the injuries of many Omaha Police Department officers and civilians, including the attempted hanging of Mayor Edward Parsons Smith; and a public rampage by thousands of white rioters who set fire to the Douglas County Courthouse in downtown Omaha. It followed more than 20 race riots that occurred in major industrial cities and certain rural areas of the United States during the Red Summer of 1919.

Omaha is the most populous city in the U.S. state of Nebraska and the county seat of Douglas County. Omaha is in the Midwestern United States on the Missouri River, about 10 mi (15 km) north of the mouth of the Platte River. The nation's 40th-most populous city, Omaha's 2020 census population was 486,051.