Butternut has multiple meanings:

• Butternut is a type of walnut tree native to North America.
• Butternut squash is an edible type of winter squash.

• Butternut can refer to the name of the yellowish color associated with the squash.

• Butternuts can refer to certain soldiers of the Confederate States of America during the American Civil War who wore butternut colored uniforms.
  • Butternut is a brand of bread sold by Interstate Bakeries Corporation.
• USS Butternut is a ship of the United States Navy.

As a place name, Butternut can refer to:

• Ski Butternut, a ski resort in Great Barrington, Massachusetts, USA
• Tennessee, USA (The Butternut State)
• Butternut, Wisconsin
• Butternut Valley Township, Minnesota
• Butternuts, New York