Brea (; meaning "oil" or "tar" in Spanish) is a city in northern Orange County, California. The population as of the 2010 census was 39,282. It is located 33 miles (53 km) southeast of Los Angeles.
The city began as a center of crude oil production, was later propelled by citrus production, and is now an important retail center because of the large Brea Mall and the recently redeveloped Brea Downtown. Brea is also known for its extensive public art program which began in 1975 and continues today with over 140 artworks in the collection placed and located throughout the city. Brea's public art program has been used as a model and inspiration for many public art programs across the United States.
The area was visited on July 29, 1769 by the Spanish Portolá expedition – the first Europeans to see inland parts of Alta California. The party camped in Brea Canyon, near a large native village and a small pool of clean water. A historical marker dedicated to his visit stands in Brea Canyon just north of town.
The village of Olinda was founded in present-day Carbon Canyon at the beginning of the 19th century and many entrepreneurs came to the area searching for "black gold" (petroleum). In 1894, the owner of the land, Abel Stearns, sold 1,200 acres (4.9 km2) to the west of Olinda to the newly created Union Oil Company of California, and by 1898 many nearby hills began sporting wooden oil-drilling towers on the newly discovered Brea-Olinda Oil Field.