The Haslet area was settled about 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. The Haslet post office opened there in 1887. The community was named for the Michigan hometown of the railroad’s contractor.
In 1896 the community had a school with twenty-one students and one teacher. Ten years later the Haslet school had twenty-five students. Haslet’s population was sixty-seven in 1903 and fifty in 1915. During the 1920s Haslet had three grocery stores as well as a hardware store, dry goods store, and cotton gin. It reported a population of sixty-nine in the mid-1930s.
The availability of war-related employment in Fort Worth probably contributed to the growth of Haslet’s population to 175 by the late 1940s. It maintained this population through the 1950s, and in the mid-1960s, by which point it had incorporated, Haslet had a population of 250 and seven businesses. In 1976 it had 276 residents and five businesses. By 1990 Haslet, a commuter community for Fort Worth, had 795 residents and some twelve businesses. In 2000 the population was 1,134.