South Coast Plaza is a regional shopping mall in Costa Mesa, California. The largest shopping center on the West Coast of the United States, its pre-COVID sales of over $1.5 billion annually were the highest in the United States. Its 275 retailers represent the highest concentration of design fashion retail in the U.S., with the second highest sales-volume in California at $800 per square foot ($8,600/m2)—second only to Westfield Valley Fair in San Jose-Santa Clara, at $809 per square foot ($8,710/m2). The national average is $411 per square foot ($4,420/m2). The mall is anchored by three Macy's stores, Nordstrom, Bloomingdale's, and Saks Fifth Avenue. South Coast Plaza is the largest shopping mall in California and the 4th largest in the United States.

Costa Mesa is a city in Orange County, California, United States. Since its incorporation in 1953, the city has grown from a semi-rural farming community of 16,840 to an urban area including part of the South Coast Plaza–John Wayne Airport edge city, one of the region's largest commercial clusters, with an economy based on retail, commerce, and light manufacturing. The city is home to the two tallest skyscrapers in Orange County. The population was 111,918 at the 2020 census.