The Trinity Broadcasting Network is an international Christian-based broadcast television network and the world's largest religious television network. TBN was headquartered in Costa Mesa, California, until March 3, 2017, when it sold its highly visible office park, Trinity Christian City. The broadcaster retained its studios in nearby Tustin. Auxiliary studio facilities are located in Irving, Hendersonville, Gadsden, Decatur, Miami and Orlando, Tulsa and New York City. TBN has characterized itself as broadcasting programs hosted by a diverse group of ministries from Evangelical, traditional Protestant and Catholic denominations, non-profit charities, Messianic Jewish and Christian media personalities. TBN also offers a wide range of original programming, faith-based films, and political opinion commentary from various distributors.

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.