Stai (plural Stais)
- A surname, from Norwegian.
- According to the 2010 United States Census, Stai is the 35582nd most common surname in the United States, belonging to 632 individuals. Stai is most common among White (95.41%) individuals.
- Hanks, Patrick, editor (2003), “Stai”, in Dictionary of American Family Names, New York City: Oxford University Press, →ISBN