Haslet is a city in Denton and Tarrant counties within the DFW Metroplex in the U.S. state of Texas and is located 15 miles north of downtown Fort Worth and 20 miles south of Denton. Haslet borders Interstate 35W, U.S. Highway 287, and Alliance Airport.
The area was settled around 1880, but it is likely that no distinct community formed until 1883, when the tracks of the Gulf, Colorado and Santa Fe Railway were extended through the area. A post office opened there in 1887. The community was named for the Michigan hometown of the railroad's contractor.