The Chester White is a breed of domestic pig which originated in Chester County, Pennsylvania. It was formerly known as the Chester County White.

The Chester White was first developed around 1815–1818, using strains of large, white pigs common to the Northeast U.S. and a white boar imported from John Russell Duke of Bedford, Bedfordshire county, England, referred to as the Woburn breed, brought by Captain Jefferies of Liverpool, England.

The Certified Pedigreed Swine Association (CPS) was formed in 1997, to combine the records of the Chester White, Poland China, and Spotted, into a central organization with individual state organizations being members.

The Chester White is a versatile breed suited to both intensive and extensive husbandry. Though not as popular as the Duroc, Yorkshire, or Hampshire, the Chester White is actively used in commercial crossbreeding operations for pork. The Chester White is the most durable of the white breeds; it can gain as much as 1.36 pounds (0.62 kg) a day and gain 1 pound (0.45 kg) for every 3 pounds (1.4 kg) of grain it is fed. Their pale colour leaves Chester Whites prone to sunburn; they must be given access to shade in the summer.