The item, being sold by Rebekah Speights, bears a resemblance to the first American president George Washington, according to Sioux City Journal.
Speights, from Dakota City, recalled the time she came across the chicken nugget. She was eating at a McDonald's with her children when she was about to throw away the leftover food.
She said: "I looked down at the McNugget and just started laughing. I saw this portrait of George Washington staring back at me."
Speights stored the chicken nugget in her freezer but was eventually convinced to put it up for auction for charity for the Family Worship Center in Sioux City.
Yesterday (February 23), the highest bid was at $356 (£225).
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