BJ's Wholesale Club Holdings, Inc., commonly referred as BJ's, is an American membership-only warehouse club chain based in Marlborough, Massachusetts, operating in the eastern United States in addition to Ohio, Michigan, Indiana, and Tennessee. The company has announced plans to expand into Alabama.

A warehouse club is a retail store, usually selling a wide variety of merchandise, in which customers may buy large, wholesale quantities of the store's products, which makes these clubs attractive to both bargain hunters and small business owners. The clubs are able to keep prices low due to the no-frills format of the stores. They are distinguished from traditional cash-and-carry wholesale businesses in that their warehouses are substantially larger in size, and they do not cater purely to businesses but also allow some or all types of consumers to obtain memberships. They are also distinguished from warehouse stores in that they usually charge annual membership fees, and require presentation of proof of membership at the warehouse entrance and again at the point of sale.