The term "doughnuts" (d-o-u-n-t), or "doughnuts" (d-o-u-g-h-u-n-t), likely derives from the early version of the treat, which were often made from small balls of dough, fried and sweetened.

The name "doughnut" could be a literal description, with "dough" referring to the pastry dough used, and "nut" referring to the original small round shape resembling a nut.

Another theory suggests that the term "nut" might refer to the use of nuts as a filling or decoration in early recipes. The first recorded use of the term "doughnut" was in Washington Irving's 1809 book, A History of New York, where he mentioned doughnuts in reference to the Dutch settlers' fried pastries.

The simplified spelling "doughnuts" became popular in the United States in the 20th century, particularly after the rise of brand-like Dunkin' Donuts.