The first white settlement occurred in the area with the establishment of convict timber camps in the time of Governor Lachlan Macquarie. Permanent white settlement of Pennant Hills began only in the 1840s and took off with the arrival of the Northern railway line in the 1880s. In August 1912 the federal government opened a Wireless Telegraphy Station, the first of its kind on a national level. The suburb has grown considerably since the 1950s, when the motor car became commonplace.