Orange County is included in the Los Angeles-Long Beach-Anaheim, CA Metropolitan Statistical Area. Thirty-four incorporated cities are located in the county; the newest is Aliso Viejo, which was incorporated in 2001. Anaheim was the first city, incorporated in 1870, when the region was still part of neighboring Los Angeles County. Whereas most population centers in the United States tend to be identified by a major city with a large central business district, there is no single major CBD or dominant urban center in Orange County. Santa Ana, Costa Mesa, and Irvine all have smaller high-rise CBDs, and other historically older cities like Anaheim, Fullerton, Huntington Beach, and Orange have traditional American downtowns without high-rises. The northern and central portions of the county are heavily urbanized and fairly dense, despite the prevalence of the single-family home as a dominant land use. The southern portion of the county is more suburban, with less density and limited urbanization. There are several edge city-style developments such as Irvine Business Center, Newport Center, and South Coast Metro.

The area's warm Mediterranean climate and 42 miles of year-round beaches attract millions of tourists annually. Huntington Beach is a hot spot for sunbathing and surfing; nicknamed "Surf City, U.S.A.", it is home to many surfing competitions. "The Wedge", at the tip of The Balboa Peninsula in Newport Beach, is one of the most famous body surfing spots in the world. Southern California surf culture is prominent in Orange County's beach cities.

Orange County has a history of large planned communities. Nearly 30 percent of the county was created as master planned communities, the most notable being the City of Irvine, Coto de Caza, Anaheim Hills, Tustin Ranch, Tustin Legacy, Ladera Ranch, Talega, Rancho Santa Margarita, and Mission Viejo. Irvine is often referred to as a model master-planned city because its villages of Woodbridge, Northwood, University Park, and Turtle Rock that were laid out by the Irvine Company of the mid-1960s before it was bought by a group of investors that included Donald Bren.