What is "mid-cities"

The Mid-Cities is a suburban region of Texas filling the thirty-mile span between Dallas and Fort Worth. These communities include the cities of Irving, Arlington, Grand Prairie, Lewisville, Flower Mound, Grapevine, Southlake, Colleyville, HEB ( Hurst, Euless and Bedford), NRH ( North Richland Hills and Richland Hills), Haltom City, Watauga, Keller, and Roanoke.

Three of these communities, Arlington (population 365,438), Irving (population 216,290), and Grand Prairie (population 175,396), are notable cities in their own right, and each ranks among the larger cities in Texas.