A metroplex is a contiguous metropolitan area that has more than one principal anchor city of near equal importance.
It is this "near equal" importance that makes cities such as, Mexico City, New York City, Los Angeles, Houston, Chicago, and Phoenix not metroplexes, though they do have secondary anchor cities in their metropolitan areas.
The term was coined to specifically describe the Dallas–Fort Worth metroplex. According to the North Texas Commission (NTC), the term originated from an ad agency's combination of the terms "metropolitan" and "complex". The NTC copyrighted the term "Dallas/Fort Worth Metroplex" in 1972 as a replacement for the previously-ubiquitous "North Texas".
- Gold Coast
- NSW Hunter Region
- Shanghai-Hangzhou-Nanjing, i.e., "Hu-Ning-Hang" which is usually used in Chinese news.
- Canton-Shamchun-Hong Kong-Macau, major cities of the Pearl River Delta region
- The Ruhr area, consisting of Dortmund, Essen, Duisburg, Bochum, Gelsenkirchen, Oberhausen and other cities
- Katowice urban area: a large industrial region in Upper Silesia, with a population of around 3 million people. Although it is named after the administrative capital Katowice, other large cities such as Sosnowiec, Gliwice, Zabrze, Ruda Śląska, Rybnik, Tychy, Dąbrowa Górnicza, Chorzów, Jaworzno and Jastrzębie-Zdrój are included as well as numerous other smaller towns such as Świętochłowice, Wodzisław Śląski and Oświęcim among many others.
- Tekirdağ-Istanbul-Izmit-Adapazarı-Yalova-Bursa, also known as Eastern Marmara Metroplex
- Adana-Mersin Metropolitan Area
United Arab Emirates
- Central Lancashire: (City of) Preston, parts of Chorley, Fulwood, Leyland, Walton-le-Dale, Chorley Rural District and Preston Rural District
- Medway: Gillingham-Rochester-Chatham
- South Hampshire metropolitan area: Southampton-Portsmouth
- South East Dorset Conurbation: Bournemouth-Poole
- West Yorkshire Urban Area: Leeds-Bradford
In the United States, the term "Metroplex" most often refers to the Dallas–Fort Worth area. Other metropolitan areas in the U.S. that may locally be called a "metroplex" are:
- Baltimore-Washington, Maryland/District of Columbia
- Raleigh-Durham-Chapel Hill, North Carolina, more often called "The Triangle"
- Gulfport-Biloxi, Mississippi
- Minneapolis-Saint Paul, Minnesota, more often called the "Twin Cities"
- San Bernardino-Riverside, California, more often called the Inland Empire or the Twin Cities of the West
- San Jose-Oakland-San Francisco, California, more often called the "Bay Area"
- Tampa-St. Petersburg, Florida, referred to together as Tampa Bay
- Miami-Ft. Lauderdale, Florida, also known as Florida's "Gold Coast"
- Winston-Salem–Greensboro–High Point, North Carolina, more often called the "Piedmont Triad"
- Huntsville–Athens–Decatur–Florence, Alabama, more often called the "Tennessee Valley" area or "The Shoals", referring to nearby Muscle Shoals, Alabama
- Virginia Beach-Norfolk-Newport News, VA-NC more often called "Hampton Roads" and also known as the Tidewater Region
- Daytonnati, a convergence of the urban areas of both Dayton and greater Cincinnati
- Dallas-Fort Worth, Texas, a metroplex that was established in 1972, The estimated 2011 U.S Census population is 6,526,548, A conventional hub usually called as "North Texas"
- -: Detroit–Windsor
- -: El Paso–Juárez
- -: Golden Horseshoe–Buffalo
- -: Laredo–Nuevo Laredo
- -: Matamoros–Brownsville
- -: San Diego–Tijuana
- North Texas Commission. "History". Retrieved 1 October 2013.
- (Polish)/(English) Powierzchnia i ludność w przekroju terytorialnym w 2008 – Central Statistical Office in Poland