French fries (American English, with "French" often capitalized), or chips, fries, or French-fried potatoes are batons of deep-fried potato. North Americans refer to any elongated pieces of fried potatoes as fries, while in the United Kingdom, Australia, Ireland and New Zealand, long, thinly cut slices of fried potatoes are often called fries to distinguish them from the more thickly cut strips called chips. French fries are known as frites, patates frites or pommes frites in French, a name which is also used in many non-French-speaking areas, and have names that mean "fried potatoes" or "French potatoes" in others.

Thomas Jefferson had "potatoes served in the French manner" at a White House dinner in 1802. The expression "French Fried Potatoes" first occurs in print in English in the 1856 work Cookery for Maids of All Work by E. Warren: "French Fried Potatoes. – Cut new potatoes in thin slices, put them in boiling fat, and a little salt; fry both sides of a light golden brown colour; drain." In the early 20th century, the term "French fried" was being used in the sense of "deep-fried", for other foods such as onion rings or chicken.