Flower Mound is an incorporated town located in Denton and Tarrant counties in the U.S. state of Texas. Located northwest of Dallas and northeast of Fort Worth adjacent to Grapevine Lake, the town derives its name from a prominent 12.5-acre mound located in the center of town. After settlers used the site for religious camps during the 1840s, the area around Flower Mound was first permanently inhabited in the 1850s; however, residents did not incorporate until 1961.