The Palomar Ballroom, built in 1925, was a famous ballroom in Los Angeles, California, in the United States. It was destroyed by a fire on October 2, 1939.

Originally named the El Patio Ballroom and located on the east side of Vermont Avenue between 2nd and 3rd Street, it boasted being “the largest and most famous dance hall on the West Coast.” The building featured a large mezzanine, a balcony, and a seventy-five hundred square foot patio. The dance floor could accommodate four thousand couples. Admission was 40 cents for gentlemen and 25 cents for ladies. Opening night was attended by 20,000 people, including many of Hollywood's silent screen stars. Klieg lights illuminated minaret structures on the roof.

On August 21, 1935, Benny Goodman began his first Palomar engagement that marked the start of the swing era. The ballroom hosted popular bands including those led by Tommy Dorsey, Glenn Miller, Artie Shaw, Glen Gray, Jimmy Dorsey, and Kay Kyser, among others.

The Palomar burned to the ground on October 2, 1939. The response of LAFD was delayed by an address error. The Charlie Barnet Orchestra lost most of its equipment in the fire. Their tune All Burned Up was a gallows humor reference to the event.

Courtesy Eric Lynxwiler Collection.