Cheswick is a borough in Allegheny County, Pennsylvania, United States. The population was 1,899 at the 2000 census.
Cheswick, named for a town in England, is a small town of about 350 acres (1,400,000 m2). The history of the lands of Cheswick seems to have belonged to the Keen family at least in part, for Archie Pillow, or Pillar, as spelled in old records, inherited land from the Keen family. That land, in part, is where Cheswick is today. Archie's brother, George, once owned the second oldest house in the community. Thomas Pillow owned the land from Highland Avenue to the Harmar Township line.
The level land near the river (Allegheny) used as farmland (Borland farm). Borland & Truck farms sold vegetables to Pittsburgh in the days of the canal. Barges and rafts of lumber were floated down the river to the steel mills. The men were fed by women who took baked goods out to the slow moving barges in boats. In the days of the canal, wealthy families built great Victorian houses along the canal. Later, when the railroad bought out the right of way, the noise and dust became disturbing and many houses became run down and neglected.