Sheetz, Inc. is an American chain of convenience stores. Its stores, which are open 24/7 year-round, offer made-to-order fast food, and most include a gas station, while a few locations are full-scale truck stops, offering showers and a laundromat. The family-owned company has over 21,000 employees, and operates more than 800 company-owned stores located in Western, Central, and Northeastern Pennsylvania, West Virginia, Maryland, Ohio, Virginia, North Carolina, and Michigan as of 2025.

Sheetz is the dominant convenience store chain in Pennsylvania, holding a virtual monopoly in its native Altoona, and a commanding share of the Pittsburgh, Harrisburg, and Wyoming Valley markets. It is noticeably absent from Philadelphia and the Delaware Valley, due to the presence of competitor Wawa, leading to a fierce "rivalry" between the two chains among Pennsylvanians. However, the two companies themselves have a friendly relationship.

Sheetz, Inc. was founded by G. Robert "Bob" Sheetz in 1952 when he purchased one of his father's five dairy stores located in Altoona. In 1961, Bob hired his brother Steve to work part-time.

In 1963, the company opened its second store under the name "Sheetz Kwik Shopper." A third store followed in 1967. In 1969, Steve became general manager. The brothers planned to expand at the rate of one store per year with a target of seven stores by 1972. In 1972, the company expanded from seven to fourteen stores. One year later, Sheetz began selling gasoline and opened the first self-serve gas pumps in central Pennsylvania. The first Sheetz store outside Pennsylvania opened in Maryland in 1976.

In 1983, Bob retired and Steve became president. By 1983, Bob and Steve had opened 100 stores. At that time, the "Kwik Shopper" in "Sheetz Kwik Shopper" was removed.

R. "Stan" Sheetz, Bob's son, became president. Steve assumed the position of chairman of the board in 1995. To this day, Sheetz maintains a family business with four family members serving on the executive committee.^{[needs update]}

During the mid-1990s, the chain discontinued It! Cola, its private-label brand of soft drinks. The drink was available in cans, bottles, and as a fountain drink, all of which were replaced by Pepsi products. The chain has both Pepsi and Coca-Cola in its fountains. In 1997, the company resumed store expansion, expanding into Ohio by opening a location in the Youngstown area along I-80 in Weathersfield Township, just east of Girard. At that time, the company introduced touchscreen ordering. Shortly afterwards, the chain expanded into North Carolina. In September 2001, Sheetz opened a distribution center in Claysburg, Pennsylvania. In December 2004, Sheetz began offering their new MasterCard PayPass with RFID technology, and was one of the first retailers to accept such technology, ahead of McDonald's, Arby's, CVS, and rival 7-Eleven, all of which introduced it nationally in 2014.

Sheetz became Pennsylvania's second retail chain to offer E85 ethanol-based fuel alternatives at select stations on July 10, 2006. In 2008, Sheetz opened its first commissary, Sheetz Bros. Kitchen, to produce fresh sandwiches and bakery products sold at Sheetz locations.